Template:Infobox manganese

Manganese,  ₂₅Mn

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General properties
Pronunciation	Template:Infobox element/pronunciation
Appearance	silvery metallic
Standard atomic weight (Ar, standard)	Template:Infobox element/standard atomic weight
Mass number	Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Manganese in the periodic table
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Atomic number (Z)	25
Group	Template:Infobox element/group
Period	period 4
Block	d-block
Element category	Template:Infobox element/category format
Electron configuration	[Ar] 3d5 4s2
Electrons per shell	2, 8, 13, 2
Physical properties
Phase at STP	solid
Melting point	1519 K ​(1246 °C, ​2275 °F)
Boiling point	2334 K ​(2061 °C, ​3742 °F)
Density (near r.t.)	7.21 g/cm3
when liquid (at m.p.)	5.95 g/cm3
Heat of fusion	12.91 kJ/mol
[[Enthalpy of vaporization|Heat of Template:Engvar]]	221 kJ/mol
Molar heat capacity	26.32 J/(mol·K)
[[Vapor pressure|Template:Engvar pressure]] Template:Infobox element/vapor pressure table
Atomic properties
Oxidation states	Template:Infobox element/symbol-to-oxidation-state
Electronegativity	Pauling scale: 1.55
[[Ionization energy|Template:Engvar energies]]	1st: 717.3 kJ/mol 2nd: 1509.0 kJ/mol 3rd: 3248 kJ/mol (more)
Atomic radius	empirical: 127 pm
Covalent radius	Low spin: 139±5 pm High spin: 161±8 pm
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Other properties
Crystal structure	​Template:Infobox element/crystal structure Template:Infobox element/crystal structure
Speed of sound thin rod	5150 m/s (at 20 °C)
Thermal expansion	21.7 µm/(m·K) (at 25 °C)
Thermal conductivity	7.81 W/(m·K)
Electrical resistivity	1.44 µΩ·m (at 20 °C)
Magnetic ordering	paramagnetic
Magnetic susceptibility	(α) +529.0·10−6 cm3/mol (293 K)
Young's modulus	198 GPa
Bulk modulus	120 GPa
Mohs hardness	6.0
Brinell hardness	196 MPa
CAS Number	7439-96-5
History
Discovery	Carl Wilhelm Scheele (1774)
First isolation	Johann Gottlieb Gahn (1774)
Main isotopes of manganese
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