Periodic Table
32
Ge
72.63
Germanium
MetalloidMetalloid semiconductor; Mendeleev's eka-silicon.
Electronic Configuration
[Ar] 3d¹⁰ 4s² 4p²or1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p²
Electron shells
2e⁻n=1
8e⁻n=2
18e⁻n=3
4e⁻n=4
Properties
Atomic number
32
Atomic mass
72.63 u
Category
Metalloid
Block / Group / Period
p · 14 · 4
Valence electrons
4
Oxidation states
+4, +2
Electronegativity
2.01
Atomic radius
125 pm
Ionization energy
762 kJ/mol
Electron affinity
119 kJ/mol
Melting point
1211 K / 938 °C
Boiling point
3106 K / 2833 °C
Density
5.323 g/cm³
State at 25 °C
solid
Personal Notes
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