Manganese (Mn)
Manganum
Manganese (Mn) is a transition metal in period 4, group 7. Its relative atomic mass is 54.938 and the molar mass of the atom is 54.938 g/mol.
Atomic number 25
Atomic mass 54.938
Molar mass 54.938 g/mol
Category Transition metal Solid
Properties of manganese
| Atomic number | 25 |
|---|---|
| Symbol | Mn |
| Latin name | Manganum |
| Relative atomic mass | 54.938 |
| Molar mass | 54.938 g/mol |
| Group, period, block | 7, 4, d |
| Category | Transition metal |
| State at 20 °C | Solid |
| Electron configuration | [Ar] 3d⁵ 4s² |
| Electronegativity (Pauling) | 1.55 |
| Atomic radius | 140 pm |
Electron configuration of manganese
Electrons per shell
K2L8M13N2
Full notation
1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s²
Noble-gas notation
25 protons · 25 electrons[Ar] 3d⁵ 4s²
Formula and compounds of manganese
Simple substanceMnmanganeseMolar mass of Mn: 54.938 g/mol
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Frequently asked questions
The relative atomic mass of manganese is 54.938, so the molar mass of the atom is 54.938 g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s². Noble-gas notation: [Ar] 3d⁵ 4s².