Template:Infobox manganese

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25 chromium ← manganese → iron - ↑ Mn ↓ Tc Periodic table - Extended periodic table
General
Name, symbol, number	manganese, Mn, 25
Chemical series	transition metals
Group, period, block	7, 4, d
Appearance	silvery metallic
Standard atomic weight	54.938045(5) g·mol−1
Electron configuration	[Ar] 4s2 3d5
Electrons per shell	2, 8, 13, 2
Physical properties
Phase	solid
Density (near r.t.)	7.21 g·cm−3
Liquid density at m.p.	5.95 g·cm−3
Melting point	1519 K (1246 °C, 2275 °F)
Boiling point	2334 K (2061 °C, 3742 °F)
Heat of fusion	12.91 kJ·mol−1
Heat of vaporization	221 kJ·mol−1
Specific heat capacity	(25 °C) 26.32 J·mol−1·K−1
Vapor pressure P/Pa 1 10 100 1 k 10 k 100 k at T/K 1228 1347 1493 1691 1955 2333
Atomic properties
Crystal structure	cubic A12
Oxidation states	7, 6, 5 [1], 4, 3, 2, 1 [2] (oxides: acidic, basic or amphoteric depending on the oxidation state)
Electronegativity	1.55 (Pauling scale)
Ionization energies (more)	1st: 717.3 kJ·mol−1
	2nd: 1509.0 kJ·mol−1
	3rd: 3248 kJ·mol−1
Atomic radius	140 pm
Atomic radius (calc.)	161 pm
Covalent radius	139 pm
Miscellaneous
Magnetic ordering	paramagnetic
Electrical resistivity	(20 °C) 1.44 µΩ·m
Thermal conductivity	(300 K) 7.81 W·m−1·K−1
Thermal expansion	(25 °C) 21.7 µm·m−1·K−1
Speed of sound (thin rod)	(20 °C) 5150 m/s
Young's modulus	198 GPa
Bulk modulus	120 GPa
Mohs hardness	6.0
Brinell hardness	196 MPa
CAS registry number	7439-96-5
Selected isotopes
Main article: Isotopes of manganese iso NA half-life DM DE (MeV) DP 52Mn syn 5.591 d ε - 52Cr β+ 0.575 52Cr γ 0.7, 0.9, 1.4 - 53Mn syn 3.74 ×106 y ε - 53Cr 54Mn syn 312.3 d ε - 54Cr γ 0.834 - 55Mn 100% 55Mn is stable with 30 neutrons
References
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