25Mn54.938
Transition Metald-block
Manganese
Element 25 on the periodic table, symbol Mn, group 7, period 4.
Manganese is a chemical element with symbol Mn and atomic number 25. It is not found as a free element in nature; it is often found in combination with iron, and in many minerals. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels.
Appearance: silvery metallic
Properties
- Atomic Number
- 25
- Atomic Mass
- 54.9380 u
- Group
- 7
- Period
- 4
- Block
- d-block
- Category
- Transition Metal
- State at 25 °C
- Solid
- Melting Point
- 1,519 K · 1,245.9 °C
- Boiling Point
- 2,334 K · 2,060.9 °C
- Density
- 7.21 g/cm³
- Atomic Radius
- 140 pm
- Electronegativity
- 1.55
- Oxidation States
- +2, +4, +7
- Abundance in Crust
- 950 mg/kg
- Discovered
- 1774
- Discovered By
- Torbern Olof Bergman
Electron Configuration
[Ar] 3d5 4s2
1s2 2s2 2p6 3s2 3p6 4s2 3d5
Ionisation Energies (kJ/mol)
- 1. 717.3
- 2. 1,509
- 3. 3,248
- 4. 4,940
- 5. 6,990
- 6. 9,220
- 7. 11,500
- 8. 18,770
Elements near Manganese
Elements in the same group share the number of outer electrons and behave in similar ways. Elements in the same period share a shell, so they change steadily from left to right.