Neptunium Properties, Molecular Formula, Applications - WorldOfChemicals

Neptunium Properties




Neptunium is a radioactive metallic element. Its most stable isotope, 237Np, is a by-product of nuclear reactors and plutonium production and it can be used as a component in neutron detection equipment. Neptunium is also found in trace amounts in uranium ores due to transmutation reactions. It is fissionable, and could theoretically be used as fuel in a fast neutron reactor or a nuclear weapon.

Chemical Properties

Appearance Silvery Metallic Solid
Atomic Number 93
Atomic Weight 237 g/mol
Block f
Boiling Point 4000 °C
CAS Number 7439-99-8
Crystal Structure Orthorhombic, Tetragonal and Cubic
Density 20.45 g/cm3
Electron Configuration 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 4d10 5p6 4f14 5d10 6s2 6p6 5f4 6d1 7s2
Ionization Energy 604.5 KJ/mol
Melting Point 637 °C
Oxidation State 7,6,5,4,3
Period 7
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