Manganese (Mn)
Manganese (Mn) is element 25 of the periodic table, a transition metal in period 4 and group 7. Its standard atomic weight is 54.938043, so one mole of manganese atoms has a mass of 54.938043 g. At room temperature it is a solid; it melts at 1245.85 °C and boils at 2060.85 °C.
| Atomic number | 25 |
|---|---|
| Symbol | Mn |
| Standard atomic weight | 54.938043 |
| Molar mass | 54.938043 g/mol |
| Category | Transition metal |
| Group | 7 |
| Period | 4 |
| Block | d-block |
| Electron configuration | [Ar] 4s2 3d5 |
| Oxidation states | +7, +4, +3, +2 |
| Electronegativity (Pauling) | 1.55 |
| Atomic radius (van der Waals) | 197 pm |
| First ionisation energy | 7.434 eV (717.3 kJ/mol) |
| Electron affinity | — |
| State at room temperature | Solid |
| Melting point | 1519 K (1245.85 °C) |
| Boiling point | 2334 K (2060.85 °C) |
| Density | 7.3 g/cm³ |
| Discovered | 1774 |
Group 7
Calculate with Manganese
Atomic weight: IUPAC CIAAW standard atomic weight. Other properties: PubChem (U.S. National Library of Medicine, public domain). Values such as melting point and radius depend on how they were measured; check a data book for precise work.