25
Mn
54.938
Manganese (Mn)
Element 25 · Period 4 · Group 7
transition-metal
solid at room temp
d-block
About Manganese
Essential trace element. Key in steel production for hardness and toughness.
Physical Properties
Atomic Mass
54.938 u
State at 25°C
Solid
Melting Point
1246 °C
Boiling Point
2061 °C
Density
7.47 g/cm³
Magnetism
Paramagnetic
Atomic Properties
Electron Configuration
[Ar] 3d⁵ 4s²
Electron Shells
2, 8, 13, 2
Electronegativity
1.55
Atomic Radius
161 pm
Ionization Energy
717 kJ/mol
Oxidation States
-3 to +7
Discovery & History
Discovered By
Johan Gottlieb Gahn
Discovery Year
1774
Named By
Johan Gottlieb Gahn
Name origin: Latin: Magnesia district
Frequently Asked Questions
- Is Manganese a metal, nonmetal, or metalloid?
- Manganese is classified as a transition-metal.
- What state is Manganese in at room temperature?
- Manganese is a solid at standard room temperature (25°C).
- What is the atomic mass of Manganese?
- Manganese has an atomic mass of 54.938 atomic mass units (u).
- Who discovered Manganese?
- Manganese was discovered by Johan Gottlieb Gahn in 1774.
- Where is Manganese on the periodic table?
- Manganese is element number 25, located in period 4 and group 7.