Neptunium
Symbol:
Np
Atomic Number: 93
Atomic Weight: 237 (most stable)
Boiling Point: 4175 K
Melting Point: 912 K
Density at 300K: 20.2 g/cm
3
Covalent radius: ???
Atomic radius: ???
Atomic
volume: 21.1 cm
3/mol
First
ionization potental: 6.19 V
Specific heat capacity: ??? Jg
-1K
-1
Thermal conductivity: 6.3 Wm
-1K
-1
Electrical conductivity: 0.8*10
6Ω
-1m
-1
Heat of fusion: ??? kJ/mol
Heat of vaporization: ??? kJ/mol
Electronegativity: 1.36 (Pauling's)