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(Àtúnjúwe láti Manganese)
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Manganese
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25Mn
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Ìhànsójú
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silvery metallic
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Àwọn ìdámọ́ wíwọ́pọ̀
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Orúkọ, àmì-ìdámọ́, nọ́mbà
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manganese, Mn, 25
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Ẹ̀ka ẹ́límẹ̀nti
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transition metal
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Ẹgbẹ́, àsìkò, àdìpò
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7, 4, d
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Ìwúwo átọ́mù
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54.938045(5)
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Ìtòléra ẹ̀lẹ́ktrónì
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[Ar] 4s2 3d5 2, 8, 13, 2
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Physical properties
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Phase
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solid
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Density (near r.t.)
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7.21 g·cm−3
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Liquid density at m.p.
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5.95 g·cm−3
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Melting point
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1519 K, 1246 °C, 2275 °F
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Boiling point
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2334 K, 2061 °C, 3742 °F
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Heat of fusion
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12.91 kJ·mol−1
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Heat of vaporization
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221 kJ·mol−1
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Molar heat capacity
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26.32 J·mol−1·K−1
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Vapor pressure
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P (Pa)
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1
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10
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100
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1 k
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10 k
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100 k
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at T (K)
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1228
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1347
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1493
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1691
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1955
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2333
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Atomic properties
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Oxidation states
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7, 6, 5, 4, 3, 2, 1, -1, -2, -3 (oxides: acidic, basic or amphoteric depending on the oxidation state)
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Electronegativity
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1.55 (Pauling scale)
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Ionization energies (more)
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1st: 717.3 kJ·mol−1
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2nd: 1509.0 kJ·mol−1
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3rd: 3248 kJ·mol−1
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Atomic radius
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127 pm
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Covalent radius
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139±5 (low spin), 161±8 (high spin) pm
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Miscellanea
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Crystal structure
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body-centered cubic
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Magnetic ordering
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paramagnetic
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Electrical resistivity
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(20 °C) 1.44 µΩ·m
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Thermal conductivity
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7.81 W·m−1·K−1
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Thermal expansion
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(25 °C) 21.7 µm·m−1·K−1
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Speed of sound (thin rod)
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(20 °C) 5150 m·s−1
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Young's modulus
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198 GPa
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Bulk modulus
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120 GPa
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Mohs hardness
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6.0
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Brinell hardness
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196 MPa
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CAS registry number
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7439-96-5
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Àwọn ísótòpù dídúró jùlọ
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Main article: Àwọn ísótòpù manganese
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· r
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