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Manganese, 25 Mn Manganese Pípè / ˈ m æ ŋ ɡ ə n iː z / (MANG -gə-neez ) Ìhànsójú silvery metallic Ìwúwo átọ̀mù A r, std (Mn) 54.9380 43(2) [ 1] Manganese ní orí tábìlì àyè
Nọ́mbà átọ̀mù (Z ) 25 Ẹgbẹ́ group 7 Àyè àyè 4 Àdìpọ̀ Àdìpọ̀-d Ẹ̀ka ẹ́límẹ́ntì Transition metal Ìtò ẹ̀lẹ́ktrọ́nù [Ar ] 3d5 4s2 Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan 2, 8, 13, 2 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ 1519 K (1246 °C, 2275 °F) Ígbà ìhó 2334 K (2061 °C, 3742 °F) Kíki (near r.t. ) 7.21 g/cm3 when liquid (at m.p. ) 5.95 g/cm3 Heat of fusion 12.91 kJ/mol Heat of 221 kJ/mol Molar heat capacity 26.32 J/(mol·K) pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
1228
1347
1493
1691
1955
2333
Atomic properties Oxidation states −3, −2, −1, 0, +1, +2 , +3, +4 , +5, +6, +7 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment Electronegativity Pauling scale: 1.55 energies Atomic radius empirical: 127 pm Covalent radius 139±5 (low spin), 161±8 (high spin) pm Color lines in a spectral range Spectral lines of manganeseOther properties Natural occurrence primordial Crystal structure (bcc) 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 µ Ω·m (at 20 °C) Magnetic ordering paramagnetic Young's modulus 198 GPa Bulk modulus 120 GPa Mohs hardness 6.0 Brinell hardness 196 MPa CAS Number 7439-96-5 Main isotopes of manganese
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↑ Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi :10.1515/pac-2015-0305 .