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 |