[DOC] [TLE] Chemistry Flashcards | Quizlet [PAR] CHEMISTRY---This element makes up about 78% of normal dry air by volume ... 
no bones about it, Sir Humphry Davy discovered calcium, Ca, Sodium, Na, & this, 
K ... in the earth's crust & the seventh most abundant in you is this special K. [DOC] [TLE] Calciumthe essentials [WebElements Periodic Table] [PAR] Calcium is an essential constituent of leaves, bones, teeth, and shells. Calcium is 
the fifth most abundant element in the earth's crust and makes up more than 3% 
of the crust. Calcium does not occur as the metal itself in nature and instead is 
found in ... Calcium was discovered by Sir Humphrey Davy in 1808 at England. [DOC] [TLE] Calcium - Element information, properties and uses | Periodic Table [PAR] Element Calcium (Ca), Group 2, Atomic Number 20, s-block, Mass 40.078. ... 
Discovered by, Humphry Davy ... Group, 2, Melting point, 842C, 1548F, 1115 K. [DOC] [TLE] Potassium, Chemical Element - reaction, water, uses, elements ... [PAR] The alkali metals are the elements that make up Group 1 (IA) of the periodic table
. ... in pure form in 1807 by English chemist Sir Humphry Davy (1778-1829). ... 
The modern chemical name for soda ash is sodium carbonate (Na 2 CO 3 ). ... 
What Davy did not know was how active the elements potassium and sodium are. [DOC] [TLE] Calcium - Wikipedia [PAR] Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is 
a soft gray Group 2 alkaline earth metal, fifth-most-abundant element by mass in 
the Earth's crust. The ion Ca2+ is also the fifth-most-abundant dissolved ion in 
seawater by both molarity and mass, after sodium, chloride, magnesium, and 
sulfate. .... Dietary calcium supplement is generally not necessary for maintaining 
bone... [DOC] [TLE] Humphry Davy - Wikipedia [PAR] Sir Humphry Davy, 1st Baronet PRS MRIA FGS (17 December 1778  29 May 
1829) was a Cornish chemist and inventor, who is best remembered today for 
isolating a series of substances for the first time: potassium and sodium in 1807 
and calcium, ..... Davy discovered calcium in 1808 by electrolyzing a mixture of 
lime and... [DOC] [TLE] Potassium - Wikipedia [PAR] Potassium is a chemical element with symbol K and atomic number 19. It was first 
isolated from ... Potassium is chemically very similar to sodium, the previous 
element in Group 1 of the .... Potassium metal was first isolated in 1807 in 
England by Sir Humphry Davy, who ... Na + KCl  NaCl + K (Thermal method): 2 
KF + CaC [DOC] [TLE] Alkaline earth metal - Wikipedia [PAR] The alkaline earth metals are six chemical elements in column (group) 2 of the 
Periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium 
(Sr), ... All the discovered alkaline earth metals occur in nature. .... (K), Boiling 
point ... Magnesium, calcium, and strontium were first produced by Humphry 
Davy in... [DOC] [TLE] It's Elemental - The Element Calcium [PAR] The Element Calcium - Basic Physical and Historical Information. ... [Click for 
Isotope Data]. 20. Ca. Calcium. 40.078. Atomic Number: 20. Atomic Weight: 
40.078. Melting Point: 1115 K (842C or 1548F) ... Metallic calcium was first 
isolated by Sir Humphry Davy in 1808 through the electrolysis of a mixture of lime 
(CaO) and... [DOC] [TLE] Strontium - Wikipedia [PAR] Strontium is a chemical element with symbol Sr and atomic number 38. An 
alkaline earth metal, ... Sodium (alkali metal) .... Thermal expansion, 22.5 m/(m
K) (at 25 C) ... Strontium is a gray, silvery metal that is softer than calcium and 
even more ... The element was eventually isolated by Sir Humphry Davy in 1808 
by the... [DOC] [TLE] potassium facts, information, pictures | Encyclopedia.com articles ... [PAR] Make research projects and school reports about potassium

Question: Make no bones about it, Sir Humphry Davy discovered calcium, Ca, Sodium, Na, & this, K
Answer: Potassium