2554.938MnManganese
Manganese (Mn) — element 25transition metal · group 7, period 4
Manganese is a chemical element with the symbol Mn and atomic number 25. It is a transition metal in group 7, period 4 of the periodic table (the d-block), with a standard atomic mass of 54.938 u. At room temperature (25 °C) manganese is a solid.
💡 Known for: Essential in steelmaking and used in alkaline batteries.
# Manganese properties
| Symbol | Mn |
|---|---|
| Atomic number | 25 |
| Atomic mass | 54.938 u |
| Category | transition metal |
| Group | 7 |
| Period | 4 |
| Block | d-block |
| Electron configuration | [Ar] 3d⁵ 4s² |
| Full configuration | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s² |
| Electrons per shell | 2, 8, 13, 2 |
| Protons / electrons | 25 / 25 |
| State at 25 °C | solid |
| Melting point | 1519 K (1245.8 °C, 2274.5 °F) |
| Boiling point | 2334 K (2060.8 °C, 3741.5 °F) |
| Density | 7.44 g/cm³ |
| Electronegativity (Pauling) | 1.55 |
| First ionization energy | 7.434 eV |
| Atomic radius | 161 pm |
| Discovered | 1774 |
# Electron configuration of manganese
The electron configuration of manganese is [Ar] 3d⁵ 4s², written out in full as 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s². Its 25 electrons fill 4 shells as 2, 8, 13, 2, so the outermost shell holds 2 electrons.
# Related elements
CrChromiumprevious elementFeIronnext elementTcTechnetiumgroup 7ReRheniumgroup 7BhBohriumgroup 7ScScandiumtransition metalTiTitaniumtransition metalVVanadiumtransition metalCoCobalttransition metalNiNickeltransition metalCuCoppertransition metalZnZinctransition metalYYttriumtransition metal
# Manganese FAQ
What is the atomic number of manganese?
The atomic number of manganese is 25: every manganese atom has 25 protons in its nucleus. Its symbol is Mn.
What is the atomic mass of manganese?
The standard atomic mass of manganese is 54.938 u.
What is the electron configuration of manganese?
Manganese's electron configuration is [Ar] 3d⁵ 4s² (1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s²), with 2, 8, 13, 2 electrons per shell.
Is manganese a metal?
Yes. Manganese is a transition metal, one of the metals.
What is the melting point of manganese?
Manganese melts at 1519 K (1245.8 °C, 2274.5 °F) and boils at 2334 K (2060.8 °C, 3741.5 °F).
What is manganese used for / known for?
Essential in steelmaking and used in alkaline batteries.