Manganese

Transition metals · Group 7 · Period 4

Atomic properties

Atomic number	25
Symbol	Mn
Standard atomic weight	54.938
Classification	Transition metals
Group	7
Period	4
Block	d-block
Electron configuration	[Ar] 3d5 4s2
Electronegativity (Pauling)	1.55
Common oxidation states	+7, +4, +2

Physical properties

Phase at 20 °C	Solid
Density	7.21 g/cm³
Melting point	1246 °C
Boiling point	2061 °C
Discovered	1774
CAS number	—

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