Manganese
Manganese (锰, symbol Mn) is chemical element number 25, a Transition Metal in period 4, group 7 of the periodic table, with a standard atomic weight of about 54.938. Hard, brittle, silvery metal. Essential trace nutrient and steel additive.
Properties
| Atomic number | 25 |
|---|---|
| Symbol | Mn |
| Atomic mass | 54.938 u |
| Category | Transition Metal |
| Period | 4 |
| Group | 7 |
| Electron configuration | [Ar] 3d⁵ 4s² |
| Electronegativity | 1.55 |
| Covalent radius | 139 pm |
| Density | 7.44 g/cm³ |
| Melting point | 1519 K |
| Boiling point | 2334 K |
| Discovery | Johan Gottlieb Gahn, 1774 |
Overview
Hard, brittle, silvery metal. Essential trace nutrient and steel additive. Element 25, Manganese (Mn), is a Transition Metal found in period 4, group 7. As a transition metal it commonly shows several oxidation states, forms coloured compounds, and is widely used in catalysts and alloys.
With 2 electrons in its outermost shell, Manganese bonds accordingly; full configuration [Ar] 3d⁵ 4s², electronegativity 1.55. At room temperature it is normally a solid; it melts near 1519 K (1245.9 °C), boils near 2334 K (2060.9 °C), has a density around 7.44 g/cm³.
Common applications range across Structural / Alloys, Agriculture / Fertiliser and Medical / Pharma. On the safety side, it carries a moderate hazard rating. It was first described by Johan Gottlieb Gahn in 1774. Browse elements of the same category in the browse view.
Electron shells
Electrons per shell: 2 · 8 · 13 · 2
Main uses
- Structural / Alloys
- Agriculture / Fertiliser
- Medical / Pharma
Hazard
Compounds containing Manganese
No compounds in this knowledge base contain Manganese yet.
Data sources
Atomic mass uses IUPAC (CIAAW) standard atomic weights; the covalent radius is from Cordero et al. (2008). Verify on the RSC Periodic Table, PubChem and Wikipedia. Educational reference only.