Manganese
Transition Metal
Manganese (Mn) is a chemical element with atomic number 25, classified as a transition metal. At room temperature it is a solid. It was discovered in 1774 by Johan Gottlieb Gahn.
Properties
- Atomic number
- 25
- Atomic mass
- 54.938 u
- Category
- Transition Metal
- Group
- 7
- Period
- 4
- Block
- d-block
- Electron configuration
- [Ar] 3d⁵ 4s²
- Phase at STP
- Solid
- Density
- 7.44 g/cm³
- Melting point
- 1519 K (1245.8 °C)
- Boiling point
- 2334 K (2060.8 °C)
- Electronegativity
- 1.55
- Atomic radius
- 161 pm
- Ionization energy
- 7.434 eV
- Discovery
- 1774 · Johan Gottlieb Gahn
Common uses
Steel production, batteries, fertilizers, glass coloring
Did you know?
Essential for steel production - no manganese means no steel industry.
Compounds you can make with manganese
Manganese appears in 2 compounds in our periodic table sandbox. Each one is a real substance with its true chemical formula — combine the right elements in the right ratio below to discover it.
-
KMnO4
Potassium Permanganate
An intensely purple oxidizer used to disinfect water and treat skin conditions.
-
MnO2
Manganese Dioxide
A black mineral used in dry-cell batteries and to color glass.