Germanium

Symbol | Ge
Latin name | Germanium
Atomic number | 32
Period | 4
Element category | Metalloids
Relative atomic mass | 72.61
Group | IV.A
Electronegativity | 1.8
Oxidation numbers | 2, 4
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p2
Density [g/cm3] | 5.32
State | Solid
Melting point [°C] | 937.4
Boiling point [°C] | 2830
Thermal conductivity [W m-1K-1] | 59.9
Heat capacity [J K-1g-1] | 0.32
Discovery | 1885
Hardness [Mohs scale] | 6.25
Electrical conductivity [S m-1] | 2 · 103
1.st ionization energy [eV] | 7.9
2.nd ionization energy [eV] | 15.934
3.rd ionization energy [eV] | 34.22
Stable isotopes | 2
Unstable isotopes | 11