Name:
Hydrogen
Symbol:
H
Atomic Number:
1
Atomic Mass:
1.0079
Atomic Volume:
11.212 cc/mol
Discovered By:
Cavendish
Discovery Date:
1766
Origin of Name:
Hydrogen - (Greek) Hydro (water) and genes (forming), named by Lavoisie
Toxicity:
Not toxic. Has narcotic effect at very high pressures.
Summary:
Hydrogen is found as a diatomic gas (H
2
). H
2
is a lighter-than-air, flammable gas. It burns with an almost invisible flame to form water. Only trace amounts of H
2
are found in the atmosphere, most H
2
has long since floated out of the atmosphere. However, hydrogen is one of the main components of stars and is thought to make up 90% of the atoms in the universe.
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