Boron
Atomic number:
5
Atomic weight:
10.811
Shells:
2,3
Orbitals:
[He] 2s2 2p1
Melting point:
2079°C
Boiling point:
4000°C
Covalent radius:
0.82
Å
Atomic volume:
4.6
cm³/mol
Atomic radius:
1.17
Å
Ionic radius:
.23 (+3)
Å
Electronegativity:
2.04
Oxidation states:
1st ionization pot.:
8.2980
V
2nd ionization pot.:
25.154
V
3rd ionization pot.:
37.93
V
Specific heat:
1.02
J/gK
Heat of fusion:
50.20
kJ/mol
Heat of vapor.:
489.70
kJ/mol
Thermal conduct.:
0.270
W/cmK
Electrical conduct.:
1.0e-12
10^6/cm ohm
Density:
2.34
g/cm³
Valence:
3
