Q: Chlorine is a chemical element with symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine is a yellow-green gas at room temperature. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine.

The most common compound of chlorine, sodium chloride (common salt), has been known since ancient times. Around 1630, chlorine gas was first synthesised in a chemical reaction, but not recognised as a fundamentally important substance. Carl Wilhelm Scheele wrote a description of chlorine gas in 1774, supposing it to be an oxide of a new element. In 1809, chemists suggested that the gas might be a pure element, and this was confirmed by Sir Humphry Davy in 1810, who named it from based on its colour.

Because of its great reactivity, all chlorine in the Earth's crust is in the form of ionic chloride compounds, which includes table salt. It is the second-most abundant halogen (after fluorine) and twenty-first most abundant chemical element in Earth's crust. These crustal deposits are nevertheless dwarfed by the huge reserves of chloride in seawater.

1. Chlorine
2. a chemical element
3. symbol Cl
4. yes
5. 17
6. yellow-green
7. gas
8. no
9. electron affinity
10. electronegativity
11. unknown
12. in 1774
13. Carl Wilhelm Scheele
14. an oxide of a new element
15. Sir Humphry Davy
16. 1810
17. yes
18. no
19. unknown
20. yes

Numbered questions:
1. What is this about?
2. What is that?
3. What is it represented by?
4. Is there a specific number?
5. What is it?
6. What color is it?
7. What state is it?
8. Is it non-reactive?
9. What does it have the highest of?
10. And ranks at number three as?
11. Where is it usually found?
12. When was it first written about?
13. By whom?
14. What did he say it was?
15. Who later spoke of it?
16. When?
17. Is it found in the ocean?
18. In small quantities?
19. What ranking is it, in common-ness?
20. Do we consume it?

input: Make use of the article to answer the questions. Johnson went to Penquay for the weekend. He arrived there late on Friday evening. The landlady of the guest house, Mrs. Smith, answered the door and showed him to his room. Johnson was very tired and went straight to bed. He slept well and didn't wake up until nine o'clock the next morning.

Johnson went downstairs for breakfast. Because there were no other guests, Mrs. Smith invited him to have breakfast with her family. Her only daughter, Catherine, about 13, was already sitting in the dining-room. Mrs. Smith went to the kitchen to prepare breakfast. Johnson noticed there were four places at the table and asked Catherine if there was another guest. Catherine told him that it was an empty place. And it used to be her father's place. Her father had been a fisherman. Three years before he had gone out in his boat, and had never returned. Her mother always kept that place for him and made his breakfast every morning. Catherine showed him his photo on the wall. Johnson said nothing, but looked very puzzled . At that moment Mrs. Smith returned. She served four cups of tea, and put one in the empty place. Looking at the empty chair, Johnson was more puzzled.

Suddenly, Johnson heard footsteps outside the door and a tall man with a black beard walked into the room. Johnson looked scared. It was the man in the photo. He jumped up and ran out of the room. The man asked, "What's the matter?" Catherine said, "I don't know. He's a guest from London. He's here because a tall man with a black beard tried to kill him." "Catherine," the man said, "have you been telling stories again?" "Stories, father? Me?" the girl laughed. 1. where was the guest house?
2. who was in charge there?
3. who was visiting?
4. when did he get there?
5. for how long?
6. What did he do when he arrived?
7. why?
8. did he have trouble sleeping?
9. how many other guests were staying?
10. who did he have breakfast with?
11. who was the empty plate for?
12. where is he?
13. how did Johnson react when he came in?
14. why was he scared?
15. what was scary about him?
16. who said that?
17. why?
18. was she joking?
numbered_answers: 1. Penquay
2. Mrs. Smith
3. Johnson
4. Friday evening
5. the weekend
6. went straight to bed
7. he was very tired
8. no
9. none
10. Catherine
11. her father
12. outside
13. He jumped up and ran out of the room
14. It was the man in the photo.
15. Three years before he had gone out in his boat, and had never returned.
16. Catherine
17. Johnson noticed there were four places at the table
18. Yes

Arizona (; ; O'odham: "Ali sonak" [ai onak]) is a state in the southwestern region of the United States. It is also part of the Western and the Mountain states. It is the sixth largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is one of the Four Corners states. It has borders with New Mexico, Utah, Nevada, California, and Mexico, and one point in common with the southwestern corner of Colorado. Arizona's border with Mexico is 389 miles (626km) long, on the northern border of the Mexican states of Sonora and Baja California.

Arizona is the 48th state and last of the contiguous states to be admitted to the Union, achieving statehood on February 14, 1912. Historically part of the territory of "Alta California" in New Spain, it became part of independent Mexico in 1821. After being defeated in the MexicanAmerican War, Mexico ceded much of this territory to the United States in 1848. The southernmost portion of the state was acquired in 1853 through the Gadsden Purchase.

Southern Arizona is known for its desert climate, with very hot summers and mild winters. Northern Arizona features forests of pine, Douglas fir, and spruce trees; the Colorado Plateau; some mountain ranges (such as the San Francisco Mountains); as well as large, deep canyons, with much more moderate summer temperatures and significant winter snowfalls. There are ski resorts in the areas of Flagstaff, Alpine, and Tucson. In addition to the Grand Canyon National Park, there are several national forests, national parks, and national monuments. What are the answers to this following set of questions: 1. What territory is this about?
2. Was it one of the first states?
3. What number was it?
4. When did it become official?
5. Is it cold there?
6. What did it belong to beforehand?
7. Where was that?
8. Who fought against each other?
9. Who won?
10. What part of the country is AZ in?
11. How many states are bigger?
12. How does it rank in population?
13. What is the capitol?
14. Is that a small place?
15. What other country does it border?
16. How big is that?
17. What kind of forestry does it have?
18. Any others?
19. Such as?
20. Does it ever snow there?
Answer:
1. Arizona
2. no
3. the 48th
4. February 14, 1912
5. no
6. Alta California
7. New Spain
8. Mexico and America
9. America
10. the southwestern region
11. five
12. 14th
13. Phoenix
14. no
15. Mexico
16. 389 miles
17. pine
18. yes
19. Douglas fir and spruce trees
20. yes