3Ks - Chemical Structure

3Ks

Germanium Recovery Specialists

1207

Atomic number      32
Atomic mass      72.59 g.mol -1
Electronegativity according to Pauling      1.8
Density      5.3 g.cm-3 at 20°C
Melting point      937 °C
Boiling point      2830 °C
Vanderwaals radius      0.137 nm
Ionic radius      0.093 nm (+2) ; 0.054 nm (+4)
Isotopes      9
Electronic shell      [ Ar ] 3d10 4s2 4p2
Energy of first ionisation             761.2 kJ.mol -1
Energy of second ionisation      1537.0 kJ.mol -1
Energy of third ionisation          3301.2 kJ.mol –1
Energy of fourth ionisation        4409.4 kJ.mol -1

Atomic Structure

Number of Energy Levels: 4
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 18
Fourth Energy Level: 4

Isotope	Half Life
Ge-68	270.8 days
Ge-69	1.6 days
Ge-70	Stable
Ge-71	11.4 days
Ge-72	Stable
Ge-73	Stable
Ge-74	Stable
Ge-76	Stable
Ge-77	11.3 hours