Element 1      Atomic Mass: 1.0079      Symbol: H

Hydrogen was found by Henry Cavendish, he discovered it near water in 1766. it is a gas so you cannot see it. It has a density of 0.0001 and has a melting point of 14.01 (k), and a boiling point of 20.4 (k). Hydrogen makes up almost 90% of the earths atmosphere.. some things that hydrogen is used for is, rocket fuel, welding, filling balloons, and methane production. 


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