Periodic Table of the Elements: Hydrogen

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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© Copyright 1998 David August