TASK DEFINITION: In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).
PROBLEM: Context: Malaysia is a federal constitutional monarchy located in Southeast Asia. It consists of thirteen states and three federal territories and has a total landmass of separated by the South China Sea into two similarly sized regions, Peninsular Malaysia and East Malaysia (Malaysian Borneo). Peninsular Malaysia shares a land and maritime border with Thailand and maritime borders with Singapore, Vietnam, and Indonesia. East Malaysia shares land and maritime borders with Brunei and Indonesia and a maritime border with the Philippines and Vietnam. The capital city is Kuala Lumpur, while Putrajaya is the seat of the federal government. With a population of over 30 million, Malaysia is the 44th most populous country. The southernmost point of continental Eurasia, Tanjung Piai, is in Malaysia. Located in the tropics, Malaysia is one of 17 megadiverse countries on earth, with large numbers of endemic species., Metropolitan Manila, commonly known as Metro Manila or simply Manila, is the capital region of the Philippines, is the seat of government, the 2nd most populous and the most densely populated region of the country. The National Capital Region (NCR) is composed of Manila, the capital city of the country, Quezon City, the country's most populous city, and the cities of Caloocan, Las Piñas, Makati, Malabon, Mandaluyong, Marikina, Muntinlupa, Navotas, Parañaque, Pasay, Pasig, San Juan, Taguig, and Valenzuela, including the only remaining municipality of Pateros., Mandaluyong is a city in the Philippines located directly east of Manila. It is one of the sixteen cities which, along with the Municipality of Pateros, make up Metro Manila, the National Capital Region. It is known for the Ortigas Center, a commercial and business center that is also shared with Pasig. Notable institutions and establishments in the city include the Asian Development Bank, the headquarters of Banco De Oro and San Miguel Corporation and shopping malls like Shangri-La Plaza and SM Megamall., Makati, officially the City of Makati, in the Philippines, is one of the sixteen cities that make up Metro Manila. , The Philippine Institute of Sports Complex (also known as the PhilSports Complex) is a national sports complex of the Philippines. It is located in Meralco Avenue in Pasig, Metro Manila, Philippines. It is where the offices of the Philippine Sports Commission, Philippine Olympic Committee and some national sports associations are located., Pasig is a city in the Philippines which was the former provincial capital of the province of Rizal prior to the formation of Metro Manila, the National Capital Region of the country of which it became a part. Located along the eastern border of Metro Manila, Pasig is bordered on the west by Quezon City and Mandaluyong; to the north by Marikina; to the south by Makati, Pateros, and Taguig; and to the east by Antipolo, the municipality of Cainta and Taytay in the province of Rizal., Taiwan, officially the Republic of China (ROC), is a state in East Asia. Neighbors include China (officially the People's Republic of China, abbreviated as PRC) to the west, Japan to the northeast, and the Philippines to the south.
Taiwan is the most populous state that is not a member of the United Nations, and the one with the largest economy., Palau (historically Belau or Pelew), officially the Republic of Palau, is an island country located in the western Pacific Ocean. The country contains approximately 250 islands, forming the western chain of the Caroline Islands in Micronesia, and has an area of . The most populous island is Koror. The capital Ngerulmud is located on the nearby island of Babeldaob, in Melekeok State. Palau shares maritime boundaries with Indonesia, the Philippines, and the Federated States of Micronesia., The Philippines, officially the Republic of the Philippines, is a sovereign island country in Southeast Asia situated in the western Pacific Ocean. It consists of about 7,641 islands that are categorized broadly under three main geographical divisions from north to south: Luzon, Visayas, and Mindanao. The capital city of the Philippines is Manila and the most populous city is Quezon City, both part of Metro Manila. Bounded by the South China Sea on the west, the Philippine Sea on the east and the Celebes Sea on the southwest, the Philippines shares maritime borders with Taiwan to the north, Vietnam to the west, Palau to the east and Malaysia and Indonesia to the south., The Philippine Institute of Sports Football and Athletics Stadium , formerly known as the ULTRA Stadium ( University of Life Training and Recreational Arena ) , is a stadium located inside the PhilSports Complex in Pasig , Philippines . It has a seating capacity of 20,000 . The stadium was the site of the PhilSports Stadium stampede on February 4 , 2006 ., Taguig (: , officially the City of Taguig) is a highly urbanized city located in south-eastern portion of Metro Manila in the Philippines. From a thriving fishing community along the shores of Laguna de Bay, it is now an important residential, commercial and industrial center. According to the , Taguig is the 7th most populous city in the Philippines after Zamboanga City, it has a population of ., Southeast Asia or Southeastern Asia is a subregion of Asia, consisting of the countries that are geographically south of China, east of India, west of New Guinea and north of Australia. The region lies near the intersection of geological plates, with heavy seismic and volcanic activity. Southeast Asia consists of two geographic regions:, Rizal, officially known as the Province of Rizal is a province in the Philippines located in the CALABARZON region, just east of Manila. The province is named after José Rizal, one of the main national heroes of the Philippines. Rizal is bordered by Metro Manila to the west, Bulacan to the north, Quezon to the east and Laguna to the southeast. The province also lies on the northern shores of Laguna de Bay, the largest lake in the country. Rizal is a mountainous province perched on the western slopes of the southern portion of the Sierra Madre mountain range. Antipolo offers a panoramic view of Metro Manila and is the location of the Hinulugang Taktak, a waterfall attraction., Quezon City (  also known as QC) is the most populous city in the Philippines. It is one of the cities that make up Metro Manila, the National Capital Region of the Philippines. Quezon City was named after Manuel L. Quezon, second President of the Philippines, who founded the city and developed it to replace Manila as the national capital for 28 years from 1948 to 1976. Quezon City is not located in and should not be confused with Quezon Province, which was also named after the president. It is the largest city in Metro Manila in terms of land area and most populated local government unit in the country., Marikina, located on the island of Luzon in the Philippines, is one of the cities that make up Metro Manila, the National Capital Region. Marikina was the capital of the Province of Manila from 1898 to 1899. Located along the eastern border of Metro Manila, it is bordered on the west by Quezon City, to the south by Pasig and Cainta, to the north by San Mateo and to the east by Antipolo, the capital of Rizal province. According to the , it has a population of ., Antipolo, or the City of Antipolo is a city in the province of Rizal, Philippines located east of Manila. It is the provincial capital of Rizal, the most-populous city in the CALABARZON region, and the seventh most-populous city in the Philippines with a population of in ., The Municipality of Cainta "(Filipino: Bayan ng Cainta)" is a first-class urban municipality in the province of Rizal, Philippines. It is one of the oldest (originally founded on August 15, 1571), and has a land area of ., Manila (or ), officially City of Manila, is the capital of the Philippines., The Philippine Sports Commission (PSC) was created through Republic Act No. 6847 in 1990 to serve as the "sole policy-making and coordinating body of all amateur sports development programs and institutions in the Philippines". Its primary function is "to provide the leadership, formulate the policies and set the priorities and directions of all national sports promotion and development, particularly giving emphasis on grassroots participation". The Commission's Asian Games Task Force is responsible for addressing the needs of the Philippine delegation in the run-up to the 2014 Asian Games., China, officially the People's Republic of China (PRC), is a unitary sovereign state in East Asia. With a population of over 1.381 billion, it is the world's most populous country. The state is governed by the Communist Party of China, and its capital is Beijing. It exercises jurisdiction over 22 provinces, five autonomous regions, four direct-controlled municipalities (Beijing, Tianjin, Shanghai, and Chongqing), and two mostly self-governing special administrative regions (Hong Kong and Macau), and claims sovereignty over Taiwan. The country's major urban areas include Shanghai, Guangzhou, Beijing, Chongqing, Shenzhen, Tianjin and Hong Kong. China is a great power and a major regional power within Asia, and has been characterized as a potential superpower., Indonesia (or ; Indonesian: ), officially the Republic of Indonesia, is a unitary sovereign state and transcontinental country located mainly in Southeast Asia with some territories in Oceania. Situated between the Indian and Pacific oceans, it is the world's largest island country, with more than seventeen thousand islands. At , Indonesia is the world's 14th-largest country in terms of land area and world's 7th-largest country in terms of combined sea and land area. It has an estimated population of over 260 million people and is the world's fourth most populous country, the most populous Austronesian nation, as well as the most populous Muslim-majority country. The world's most populous island of Java contains more than half of the country's population., The Celebes Sea of the western Pacific Ocean is bordered on the north by the Sulu Archipelago and Sulu Sea and Mindanao Island of the Philippines, on the east by the Sangihe Islands chain, on the south by Sulawesi's Minahassa Peninsula, and on the west by Kalimantan in Indonesia. It extends 420 miles (675 km) north-south by 520 miles (837 km) east-west and has a total surface area of , to a maximum depth of . The sea opens southwest through the Makassar Strait into the Java Sea., Mindanao is the second largest and southernmost major island in the Philippines. It is also the name of one of the three island groups in the country (the other two being Luzon and the Visayas), consisting of the island of Mindanao and smaller outlying islands. Davao City is the largest city in Mindanao. As of the 2010 census, the island's population itself is 20,281,545 people, while the Mindanao island group has 21,968,174 inhabitants. Davao City is the most populous in Mindanao as 1,632,991 population, and the 2nd is Zamboanga City as 861,799 population, the 3rd is Cagayan de Oro City as 675,950 population, and followed by General Santos City as 594,446 population as of 2015 census., Luzon is the largest and most populous island in the Philippines and the 15th largest in the world. Located in the northern region of the archipelago, it is the economic and political center of the nation, being home to the country's capital city, Manila, as well as Quezon City, the country's most populous. With a population of 52.99 million , it is the fourth most populous island in the world (after Java, Honshu, and Great Britain), containing about 53% of the country's total population., The Indianapolis Motor Speedway, located in Speedway, Indiana, (an enclave suburb of Indianapolis) in the United States, is the home of the Indianapolis 500 and the Brickyard 400. It is located on the corner of 16th Street and Georgetown Road, approximately west of Downtown Indianapolis., Seating capacity is the number of people who can be seated in a specific space, in terms of both the physical space available, and limitations set by law. Seating capacity can be used in the description of anything ranging from an automobile that seats two to a stadium that seats hundreds of thousands of people. The largest sporting venue in the world, the Indianapolis Motor Speedway, has a permanent seating capacity for more than 235,000 people and infield seating that raises capacity to an approximate 400,000., Vietnam, officially the Socialist Republic of Vietnam (SRV), is the easternmost country on the Indochina Peninsula in Southeast Asia. With an estimated 90.5 million inhabitants , it is the world's 14th-most-populous country, and the eighth-most-populous Asian country. Vietnam is bordered by China to the north, Laos to the northwest, Cambodia to the southwest, Thailand across the Gulf of Thailand to the southwest, and the Philippines, Malaysia and Indonesia across the South China Sea to the east and southeast. Its capital city has been Hanoi since the reunification of North and South Vietnam in 1976., Subject: philsports football and athletics stadium, Relation: owned_by, Options: (A) brunei (B) cambodia (C) city (D) india (E) indiana (F) indianapolis (G) indonesia (H) malaysia (I) metro (J) municipality (K) philippine sports commission (L) shanghai (M) united nations

SOLUTION: philippine sports commission

PROBLEM: Context: Northamptonshire (or ; abbreviated Northants.), archaically known as the County of Northampton, is a county in the East Midlands of England. In 2011, it had a population of 629,000. The county is administered by Northamptonshire County Council and seven non-metropolitan district councils., A census is the procedure of systematically acquiring and recording information about the members of a given population. It is a regularly occurring and official count of a particular population. The term is used mostly in connection with national population and housing censuses; other common censuses include agriculture, business, and traffic censuses. The United Nations defines the essential features of population and housing censuses as "individual enumeration, universality within a defined territory, simultaneity and defined periodicity", and recommends that population censuses be taken at least every 10 years. United Nations recommendations also cover census topics to be collected, official definitions, classifications and other useful information to co-ordinate international practice., Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Radio waves have frequencies as high as 300 GHz to as low as 3 kHz, though some definitions describe waves above 1 or 3 GHz as microwaves, or include waves of any lower frequency. At 300 GHz, the corresponding wavelength is , and at 3 kHz is . Like all other electromagnetic waves, they travel at the speed of light. Naturally occurring radio waves are generated by lightning, or by astronomical objects. , A harbor or harbour (see spelling differences), or haven, is a body of water where ships, boats and barges seek shelter from stormy weather, or are stored for future use. Harbors and ports are often confused with each other. A port is a manmade facility built for loading and unloading vessels and dropping off and picking up passengers. Ports are often located "in" harbors., Alternative rock (also called alternative music, alt-rock or simply alternative) is a genre of rock music that emerged from the independent music underground of the 1980s and became widely popular in the 1990s and 2000s. In this instance, the word "alternative" refers to the genre's distinction from mainstream rock music. The term's original meaning was broader, referring to a generation of musicians unified by their collective debt to either the musical style or simply the independent, D.I.Y. ethos of punk rock, which in the late 1970s laid the groundwork for alternative music. At times, "alternative" has been used as a catch-all description for music from underground rock artists that receives mainstream recognition, or for any music, whether rock or not, that is seen to be descended from punk rock (including some examples of punk itself, as well as new wave, and post-punk)., A combined statistical area (CSA) is composed of adjacent metropolitan (MSA) and micropolitan statistical areas (µSA) in the United States and Puerto Rico that can demonstrate economic or social linkage. The United States Office of Management and Budget defines a CSA as consisting of various combinations of adjacent metropolitan and micropolitan areas with economic ties measured by commuting patterns. These areas that combine retain their own designations as metropolitan or micropolitan statistical areas within the larger combined statistical area., Exmoor is loosely defined as an area of hilly open moorland in west Somerset and north Devon in South West England. It is named after the River Exe, the source of which is situated in the centre of the area, two miles north-west of Simonsbath. Exmoor is more precisely defined as the area of the former ancient royal hunting forest, also called Exmoor, which was officially surveyed 18151818 as in extent. The moor has given its name to a National Park, which includes the Brendon Hills, the East Lyn Valley, the Vale of Porlock and of the Bristol Channel coast. The total area of the Exmoor National Park is , of which 71% is in Somerset and 29% in Devon., Virginia (, officially the Commonwealth of Virginia) is a state located in the Mid-Atlantic region of the United States, as well as in the historic Southeast. Virginia is nicknamed the "Old Dominion" due to its status as the first colonial possession established in mainland British America, and "Mother of Presidents" because eight U.S. presidents were born there, more than any other state. The geography and climate of the Commonwealth are shaped by the Blue Ridge Mountains and the Chesapeake Bay, which provide habitat for much of its flora and fauna. The capital of the Commonwealth is Richmond; Virginia Beach is the most populous city, and Fairfax County is the most populous political subdivision. The Commonwealth's estimated population is over 8.3 million, which is slightly less than New York City., A coal pier is a transloading facility designed for the transfer of coal between rail and ship., Post-punk (originally "new musick") is a broad type of rock music that emerged from the punk movement of the 1970s, in which artists departed from punk rock's raw, accessible style to pursue a variety of avant-garde sensibilities. Attempting to break from rock tradition, post-punk artists experimented with sources such as electronic music, black dance music and the avant-garde, as well as novel recording technology and production techniques. The movement also saw the frequent intersection of music with art and politics, as artists incorporated ideas from sources such as modernist literature, critical theory, cinema, and performance art. Accompanying these musical developments were communities that produced independent record labels, visual art, multimedia performances and fanzines in conjunction with the music., The Chesapeake Bay is an estuary lying inland from the Atlantic Ocean, and surrounded by the North American mainland to the west, and the Delmarva Peninsula to the east. It is the largest such body in the contiguous United States. The northern bay is within Maryland, the southern portion within Virginia, and is a very important feature for the ecology and economy of those two states, as well as others. More than 150 major rivers and streams flow into the bay's drainage basin, which covers parts of six states (New York, Pennsylvania, Delaware, Maryland, Virginia and West Virginia) plus all of the District of Columbia., A U.S. state is a constituent political entity of the United States of America. There are 50 states, which are bound together in a union with each other. Each state holds administrative jurisdiction over a defined geographic territory, and shares its sovereignty with the United States federal government. Due to the shared sovereignty between each state and the federal government, Americans are citizens of both the federal republic and of the state in which they reside. State citizenship and residency are flexible, and no government approval is required to move between states, except for persons covered by certain types of court orders (e.g., paroled convicts and children of divorced spouses who are sharing custody)., A radio station is a set of equipment necessary to carry on communication via radio waves. Generally, it is a receiver or transmitter, an antenna, and some smaller additional equipment necessary to operate them. Radio stations play a vital role in communication technology as they are heavily relied on to transfer data and information across the world., WROX - FM is an Alternative Rock formatted broadcast radio station licensed to Exmore , Virginia , serving the Norfolk / Virginia Beach ( Hampton Roads ) metro area and the Eastern Shore of Virginia ., Communication (from Latin "commnicre", meaning "to share") is the act of conveying intended meanings from one entity or group to another through the use of mutually understood signs and semiotic rules., Hampton Roads is the name of both a body of water in Virginia and the surrounding metropolitan region in Southeastern Virginia and Northeastern North Carolina, United States. Comprising the Virginia BeachNorfolkNewport News, VANC metropolitan area and an extended Combined Statistical Area that includes the Elizabeth City, NC Micropolitan Statistical Area and Kill Devil Hills, NC Micropolitan Statistical Area, Hampton Roads is known for its large military presence, ice-free harbor, shipyards, coal piers, and miles of waterfront property and beaches, all of which contribute to the diversity and stability of the region's economy., Punk rock (or simply "punk") is a rock music genre that developed in the early to mid 1970s in the United States, United Kingdom, and Australia. Rooted in 1960s garage rock and other forms of what is now known as "proto-punk" music, punk rock bands rejected perceived excesses of mainstream 1970s rock. Punk bands typically use short or fast-paced songs, with hard-edged melodies and singing styles, stripped-down instrumentation, and often political, anti-establishment lyrics. Punk embraces a DIY ethic; many bands self-produce recordings and distribute them through informal channels., The Delmarva Peninsula, or simply Delmarva, is a large peninsula on the East Coast of the United States, occupied by most of Delaware as well as the Eastern Shore of Maryland and the Eastern Shore of Virginia. Although called a peninsula, it is technically an island after the digging of the Chesapeake and Delaware Canal. The peninsula is long. In width, it ranges from near its center, to at the isthmus on its northern edge, to less near its southern tip of Cape Charles. It is bordered by the Chesapeake Bay on the west, the Delaware River, Delaware Bay, and the Atlantic Ocean on the east, and the Elk River and its isthmus on the north., Cochin Shipyard
A shipyard (also called a dockyard) is a place where ships are repaired and built. These can be yachts, military vessels, cruise liners or other cargo or passenger ships. Dockyards are sometimes more associated with maintenance and basing activities than shipyards, which are sometimes associated more with initial construction. The terms are routinely used interchangeably, in part because the evolution of dockyards and shipyards has often caused them to change or merge roles., Independent music (often shortened to indie music or indie) is music produced independently from major commercial record labels or their subsidiaries, a process that may include an autonomous, do-it-yourself approach to recording and publishing. The term "indie" is sometimes also used to describe a genre (such as indie rock and indie pop); as a genre term, "indie" may include music that is not independently produced, and most independent music artists do not fall into a single, defined musical style or genre, and usually create music that can be categorized into other genres., Exmore is the largest town in Northampton County on the Eastern Shore of the U.S. state of Virginia. The population was 1,136 at the 2000 census. A popular story is that Exmore received its name because it is the tenth railroad station south of the Delaware state line, so there were "X more" stations to go. The same website also states another theory behind the town's namethat it was named for Exmoor in Devon, southwest England. This theory is more plausible because many towns and counties in Virginia were named for places in England. Northampton County itself was named for Northamptonshire, a county in the East Midlands of England., North Carolina is a state in the southeastern region of the United States. The state borders South Carolina and Georgia to the south, Tennessee to the west, Virginia to the north, and the Atlantic Ocean to the east. North Carolina is the 28th most extensive and the 9th most populous of the U.S. states. The state is divided into 100 counties. The capital is Raleigh. The most populous municipality is Charlotte, and it is the second largest banking center in the United States after New York City., The Eastern Shore of Virginia consists of two counties (Accomack and Northampton) on the Atlantic coast of the Commonwealth of Virginia in the United States. The region is part of the Delmarva Peninsula and is separated from the rest of Virginia by the Chesapeake Bay. Its population was 45,553 as of 2010., Rock music is a genre of popular music that originated as "rock and roll" in the United States in the 1950s, and developed into a range of different styles in the 1960s and later, particularly in the United Kingdom and the United States. It has its roots in 1940s' and 1950s' rock and roll, itself heavily influenced by blues, rhythm and blues and country music. Rock music also drew strongly on a number of other genres such as electric blues and folk, and incorporated influences from jazz, classical and other musical sources., Subject: wrox-fm, Relation: located_in_the_administrative_territorial_entity, Options: (A) atlantic ocean (B) basin (C) columbia (D) delaware (E) east (F) east midlands (G) england (H) fairfax (I) fairfax county (J) forest (K) hampton (L) mainland (M) maryland (N) most (O) national park (P) new york (Q) newport (R) news (S) norfolk (T) north (U) north carolina (V) north devon (W) northampton (X) northampton county (Y) northamptonshire (Z) northern ([) of (\) ports (]) post (^) raleigh (_) richmond (`) river (a) rock (b) somerset (c) south carolina (d) united kingdom (e) virginia (f) west (g) west virginia

SOLUTION: maryland

PROBLEM: Context: Core electrons are the electrons in an atom that are not valence electrons and therefore do not participate in bonding . The number of valence electrons of an element can be determined by the periodic table group of the element . With the exception of the transition metals in groups 3 - 12 and the Lanthanide and Actinide series , the number of valence electrons ranges from 0 - 8 electrons . All the non-valence electrons for an atom of that element are considered core electrons . Core electrons are tightly bound to the nucleus . Therefore , unlike valence electrons the core electrons play a secondary role in chemical bonding and reactions by screening the positive charge of the atomic nucleus from the valence shell of electrons . In transition metals , the distinction between core and valence electrons is less distinct with electrons in the highest d - shell acting more like valence electrons than core electrons ., In chemistry and physics, the atomic number of a chemical element (also known as its proton number) is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus. It is conventionally represented by the symbol Z. The atomic number uniquely identifies a chemical element. In an uncharged atom, the atomic number is also equal to the number of electrons., An ion is an atom or a molecule in which the total number of electrons is not equal to the total number of protons, giving the atom or molecule a net positive or negative electrical charge. Ions can be created, by either chemical or physical means, via ionization., Lanthanum is a soft, ductile, silvery-white metallic chemical element with symbol La and atomic number 57. It tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. The usual oxidation state is +3. Lanthanum has no biological role and is not very toxic., Lawrencium is a synthetic chemical element with chemical symbol Lr (formerly Lw) and atomic number 103. It is named in honor of Ernest Lawrence, inventor of the cyclotron, a device that was used to discover many artificial radioactive elements. A radioactive metal, lawrencium is the eleventh transuranic element and is also the final member of the actinide series. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Twelve isotopes of lawrencium are currently known; the most stable is Lr with a half-life of 11 hours, but the shorter-lived Lr (half-life 2.7 minutes) is most commonly used in chemistry because it can be produced on a larger scale., The actinide or actinoid (IUPAC nomenclature) series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium., Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma). A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide). A gas mixture would contain a variety of pure gases much like the air. What distinguishes a gas from liquids and solids is the vast separation of the individual gas particles. This separation usually makes a colorless gas invisible to the human observer. The interaction of gas particles in the presence of electric and gravitational fields are considered negligible as indicated by the constant velocity vectors in the image. One type of commonly known gas is steam., In chemistry, a valence electron is an electron that is associated with an atom, and that can participate in the formation of a chemical bond; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair. The presence of valence electrons can determine the element's chemical properties and whether it may bond with other elements: For a main group element, a valence electron can exist only in the outermost electron shell. In a transition metal, a valence electron can also be in an inner shell. , Yttrium is a chemical element with symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a "rare earth element". Yttrium is almost always found in combination with lanthanide elements in rare earth minerals, and is never found in nature as a free element. Y is the only stable isotope, and the only isotope found in the Earth's crust., Actinium is a radioactive chemical element with symbol Ac (not to be confused with the abbreviation for an acetyl group) and atomic number 89, which was discovered in 1899. It was the first non-primordial radioactive element to be isolated. Polonium, radium and radon were observed before actinium, but they were not isolated until 1902. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. It is also sometimes considered the first of the 7th-period transition metals, although lawrencium is less commonly given that position., A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure. As such, it is one of the four fundamental states of matter (the others being solid, gas, and plasma), and is the only state with a definite volume but no fixed shape. A liquid is made up of tiny vibrating particles of matter, such as atoms, held together by intermolecular bonds. Water is, by far, the most common liquid on Earth. Like a gas, a liquid is able to flow and take the shape of a container. Most liquids resist compression, although others can be compressed. Unlike a gas, a liquid does not disperse to fill every space of a container, and maintains a fairly constant density. A distinctive property of the liquid state is surface tension, leading to wetting phenomena., A metal (from Greek  "métallon", "mine, quarry, metal") is a material (an element, compound, or alloy) that is typically hard, opaque, shiny, and has good electrical and thermal conductivity. Metals are generally malleable  that is, they can be hammered or pressed permanently out of shape without breaking or cracking  as well as fusible (able to be fused or melted) and ductile (able to be drawn out into a thin wire). About 91 of the 118 elements in the periodic table are metals, the others are nonmetals or metalloids. Some elements appear in both metallic and non-metallic forms., An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are very small; typical sizes are around 100 picometers (a ten-billionth of a meter, in the short scale)., In the classical physics observed in everyday life, if something has mass and takes up space, it is said to be composed of matter; this includes atoms (and thus molecules) and anything made up of these, but not other energy phenomena or waves such as light or sound. More generally, however, in (modern) physics, matter is not a fundamental concept because a universal definition of it is elusive: elementary constituents of atoms may not take up space individually, and massless particles may be composed to form objects that have mass (even when at rest)., Scandium is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic d-block element, it has historically been sometimes classified as a rare earth element, together with yttrium and the lanthanides. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia., A chemical element or element is a species of atoms having the same number of protons in their atomic nuclei (i.e. the same atomic number, "Z"). There are 118 elements that have been identified, of which the first 94 occur naturally on Earth with the remaining 24 being synthetic elements. There are 80 elements that have at least one stable isotope and 38 that have exclusively radioactive isotopes, which decay over time into other elements. Iron is the most abundant element (by mass) making up Earth, while oxygen is the most common element in the Earth's crust., The lanthanide or lanthanoid series of chemical elements comprises the fifteen metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. These fifteen lanthanide elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements., Lutetium is a chemical element with symbol Lu and atomic number 71. It is a silvery white metal, which resists corrosion in dry air, but not in moist air. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. Lutetium is sometimes considered the first element of the 6th-period transition metals, although lanthanum is more often considered as such., Solid is one of the four fundamental states of matter (the others being liquid, gas, and plasma). It is characterized by structural rigidity and resistance to changes of shape or volume. Unlike a liquid, a solid object does not flow to take on the shape of its container, nor does it expand to fill the entire volume available to it like a gas does. The atoms in a solid are tightly bound to each other, either in a regular geometric lattice (crystalline solids, which include metals and ordinary ice) or irregularly (an amorphous solid such as common window glass)., A rare earth element (REE) or rare earth metal (REM), as defined by IUPAC, is one of a set of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides, as well as scandium and yttrium. Scandium and yttrium are considered rare earth elements because they tend to occur in the same ore deposits as the lanthanides and exhibit similar chemical properties., Subject: core electron, Relation: part_of, Options: (A) atom (B) chemistry (C) earth (D) electron shell (E) gas (F) human (G) knife (H) liquid (I) lu (J) may (K) mine (L) molecule (M) name (N) nature (O) periodic table (P) physics (Q) series (R) solid (S) species (T) variety (U) window

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