Molybdenum, 42 Mo Molybdenum Pípè / m ə ˈ l ɪ b d ə n ə m / (mə-LIB -dən-əm ) Ìhànsójú gray metallic Ìwúwo átọ̀mù A r, std (Mo) 95.95(1) [ 1] Molybdenum ní orí tábìlì àyè
Nọ́mbà átọ̀mù (Z ) 42 Ẹgbẹ́ group 6 Àyè àyè 5 Àdìpọ̀ Àdìpọ̀-d Ẹ̀ka ẹ́límẹ́ntì Transition metal Ìtò ẹ̀lẹ́ktrọ́nù [Kr ] 4d5 5s1 Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan 2, 8, 18, 13, 1 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ 2896 K (2623 °C, 4753 °F) Ígbà ìhó 4912 K (4639 °C, 8382 °F) Kíki (near r.t. ) 10.28 g/cm3 when liquid (at m.p. ) 9.33 g/cm3 Heat of fusion 37.48 kJ/mol Heat of 617 kJ/mol Molar heat capacity 24.06 J/(mol·K) pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
2742
2994
3312
3707
4212
4879
Atomic properties Oxidation states −4, −2, −1, 0, +1,[ 2] +2, +3, +4 , +5, +6 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment Electronegativity Pauling scale: 2.16 Atomic radius empirical: 139 pm Covalent radius 154±5 pm Color lines in a spectral range Spectral lines of molybdenumOther properties Natural occurrence primordial Crystal structure (bcc) Thermal expansion 4.8 µm/(m·K) (at 25 °C) Thermal conductivity 138 W/(m·K) Electrical resistivity 53.4 n Ω·m (at 20 °C) Magnetic ordering paramagnetic [ 3] Young's modulus 329 GPa Shear modulus 126 GPa Bulk modulus 230 GPa Poisson ratio 0.31 Mohs hardness 5.5 Vickers hardness 1530 MPa Brinell hardness 1500 MPa CAS Number 7439-98-7 Main isotopes of molybdenum
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References
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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 .
↑ "Molybdenum: molybdenum(I) fluoride compound data" . OpenMOPAC.net. Retrieved 2007-12-10 .
↑ Magnetic susceptibility of the elements and inorganic compounds , in Handbook of Chemistry and Physics 81st edition, CRC press.
↑ "Molybdenum: molybdenum(I) fluoride compound data" . OpenMOPAC.net. Retrieved 2007-12-10 .