Calcium
Ca
Calcium
Alkali Earth Metal
Atomic number:
20
Atomic weight:
40.078
Shells:
2,8,8,2
Orbitals:
[Ar] 4s2
Melting point:
839°C
Boiling point:
1484°C
Covalent radius:
1.74
Å
Atomic volume:
25.9
cm³/mol
Atomic radius:
2.23
Å
Ionic radius:
1.00 (+2)
Å
Electronegativity:
1.00
Oxidation states:
1st ionization pot.:
6.1132
V
2nd ionization pot.:
11.871
V
3rd ionization pot.:
50.908
V
Specific heat:
0.63
J/gK
Heat of fusion:
8.540
kJ/mol
Heat of vapor.:
153.60
kJ/mol
Thermal conduct.:
2.00
W/cmK
Electrical conduct.:
0.298
10^6/cm ohm
Density:
1.55
g/cm³
Valence:
2
