25
Mn
54.938
Manganese
Element 25 · 54.938 u · d-block
transition metal
Essential for steel production and found in many enzymes. Makes up about 0.1% of Earth's crust.
Phase (STP)
Solid
Melting Point
1246 °C
Boiling Point
2061 °C
Density
7.44 g/cm³
Electronegativity
1.55
Atomic Radius
140 pm
Ionization Energy
717 kJ/mol
Electron Affinity
0 kJ/mol
Discovered
1774 · Johan Gottlieb Gahn
Electron Configuration
[Ar] 3d5 4s2
Electron Orbitals
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