Neptunium
Atomic number:
93
Atomic weight:
(237.0482)
Shells:
2,8,18,32,22,9,2
Orbitals:
[Rn] 5f4 6d1 7s2
Melting point:
640°C
Boiling point:
3902°C
Covalent radius:
--
Å
Atomic volume:
11.62
cm³/mol
Atomic radius:
--
Å
Ionic radius:
--
Å
Electronegativity:
1.36
Oxidation states:
6,(5),4,3
1st ionization pot.:
6.2657
V
2nd ionization pot.:
--
V
3rd ionization pot.:
--
V
Specific heat:
0.12
J/gK
Heat of fusion:
5.190
kJ/mol
Heat of vapor.:
--
kJ/mol
Thermal conduct.:
0.063
W/cmK
Electrical conduct.:
0.00822
10^6/cm ohm
Density:
20.45
g/cm³
Valence:
3,4,5,6
