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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HHe
LiBeBCNOFNe
NaMgAlSiPSClAr
KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLr

© Copyright 1998 David August