Thorium
Atomic number:
90
Atomic weight:
232.0381
Shells:
2,8,18,32,18,10,2
Orbitals:
[Rn] 6d2 7s2
Melting point:
1750°C
Boiling point:
4000°C
Covalent radius:
1.65
Å
Atomic volume:
19.9
cm³/mol
Atomic radius:
--
Å
Ionic radius:
1.05 (+4)
Å
Electronegativity:
1.3
Oxidation states:
1st ionization pot.:
6.08
V
2nd ionization pot.:
11.504
V
3rd ionization pot.:
20.003
V
Specific heat:
0.12
J/gK
Heat of fusion:
16.10
kJ/mol
Heat of vapor.:
514.40
kJ/mol
Thermal conduct.:
0.540
W/cmK
Electrical conduct.:
0.0653
10^6/cm ohm
Density:
11.7
g/cm³
Valence:
4
