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 |
|
