Selenium
Atomic number:
34
Atomic weight:
78.96
Shells:
2,8,18,6
Orbitals:
[Ar] 3d10 4s2 4p4
Melting point:
217°C
Boiling point:
684.9°C
Covalent radius:
1.16
Å
Atomic volume:
16.45
cm³/mol
Atomic radius:
1.22
Å
Ionic radius:
.50 (+4)
Å
Electronegativity:
2.55
Oxidation states:
-2,(4),6
1st ionization pot.:
9.7524
V
2nd ionization pot.:
21.19
V
3rd ionization pot.:
30.82
V
Specific heat:
0.32
J/gK
Heat of fusion:
6.694
kJ/mol
Heat of vapor.:
37.70
kJ/mol
Thermal conduct.:
0.0204
W/cmK
Electrical conduct.:
1.0e-12
10^6/cm ohm
Density:
4.79
g/cm³
Valence:
-2,4,6
