Beryllium
Be
Beryllium
Alkalai Earth Metal
Atomic number:
4
Atomic weight:
9.012182
Shells:
2,2
Orbitals:
[He] 2s2
Melting point:
1287°C
Boiling point:
2472°C
Covalent radius:
0.90
Å
Atomic volume:
5.0
cm³/mol
Atomic radius:
1.40
Å
Ionic radius:
.45 (+2)
Å
Electronegativity:
1.57
Oxidation states:
1st ionization pot.:
9.3226
V
2nd ionization pot.:
18.211
V
3rd ionization pot.:
153.893
V
Specific heat:
1.82
J/gK
Heat of fusion:
12.20
kJ/mol
Heat of vapor.:
292.40
kJ/mol
Thermal conduct.:
2.00
W/cmK
Electrical conduct.:
0.313
10^6/cm ohm
Density:
1.848
g/cm³
Valence:
2
