Periodic Table of the Elements: Neptunium

Name: Neptunium
Symbol: Np
Atomic Number: 93
Atomic Mass: (237)
Atomic Volume: ??? cc/mol
Discovered By: First synthesized by McMillan and Abelson in 1940
Discovery Date: 1940
Origin of Name: Neptunium - named for the planet Neptune
Toxicity: ???
Summary: The first trans-uranium element synthesized artificially. Trace amounts of Neptunium can be found in uranium ores as a result of natural synthesis by neutron bombardment of uranium.


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HHe
LiBeBCNOFNe
NaMgAlSiPSClAr
KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLr

© Copyright 1998 David August