Manganese

Symbol | Mn
Latin name | Manganum
Atomic number | 25
Period | 4
Element category | Transition elements
Relative atomic mass | 54.93805
Group | VII.B
Electronegativity | 1.5
Oxidation numbers | 2, 3, 4, 6, 7
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d5 4s2
Density [g/cm3] | 7.44
State | Solid
Melting point [°C] | 1244
Boiling point [°C] | 2100
Atomic radius [pm] | 161
Covalent radius [pm] | 139
Thermal conductivity [W m-1K-1] | 7.82
Heat capacity [J K-1g-1] | 0.48
Discovery | 1774
Hardness [Mohs scale] | 5.0
Brinell hardness [MPa] | 196
Young's modulus [GPa] | 198
Electrical conductivity [S m-1] | 6.2 · 105
1.st ionization energy [eV] | 7.434
2.nd ionization energy [eV] | 15.64
3.rd ionization energy [eV] | 33.667
Stable isotopes | 1
Unstable isotopes | 10