Element 25
Manganese (Mn)
Manganese (Mn) is element 25 of the periodic table, a transition metal in period 4, group 7 (d-block) with an atomic mass of 54.938 and is a solid at standard conditions.
At a glance
- Atomic number
- 25
- Symbol
- Mn
- Atomic mass
- 54.938 u
- Category
- Transition metals
- Period
- 4
- Group
- 7
- Block
- d-block
- Phase at STP
- solid
Electron structure
- Electron configuration
- 1s2 2s2 2p6 3s2 3p6 3d5 4s2
- Shorthand configuration
- [Ar] 3d5 4s2
- Electrons per shell
- 2, 8, 13, 2
- Oxidation states
- -3, -2, -1, +1, +2, +3, +4, +5, +6, +7
Physical properties
- Melting point
- 1519 K
- Boiling point
- 2334 K
- Density
- 7.44 g/cm3
- Phase
- solid
Atomic properties
- Electronegativity (Pauling)
- 1.55
- Atomic radius
- 161 pm
- Covalent radius
- 139 pm
- First ionization energy
- 717 kJ/mol
- Electron affinity
- 0 kJ/mol
Notable isotopes
| Isotope | Mass | Abundance | Stability |
|---|---|---|---|
| Mn-55 | 54.93804 | 100% | Stable |
Common uses
- Steel production
- Batteries
- Fertilizers
- Glass coloring
Discovery
- Year
- 1774
- Discovered by
- Johan Gottlieb Gahn
- Country
- Sweden