Neptunium

Symbol NpAtomic number 93
Atomic mass
237.048
 Thermal conductivity
0.063
Atomic radius
...
 Covalent radius
...
Density
20.4
 Atomic volume
11.62
Melting point
913
 Oxidation states
6,5,4,3
Boiling point
4175
 Stable isotopes
...
Heat of vapor.
...
 Electronegativity
1.36
Heat of fusion
5.19
 First ionization
6.19
Specific heat
0.12
 Electrical conduct.
...
Electron configuration

General descriptionNuclear data
 Index

Periodic Table

Chemistry concepts
 
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Neptunium

Neptunium was first made in 1940 by E M McMilland and P H Abelson of the University of California. Bombarding U238 with neutrons to form U239 leads to beta decay to form Np239. Neptunium is important as an intermediate product in the manufacture of plutonium.

Atomic dataNuclear data
 Index

Periodic Table

Chemistry concepts

Reference
Pauling
Ch. 29
 
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Neptunium Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
Atomic data
Index

Periodic Table

Chemistry concepts

Reference
Rohlf
 
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