Molybdenum

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Molybdenum
42Mo
Cr

Mo

W
niobiummolybdenumtechnetium
Ìhànsójú
gray metallic
Àwọn ìdámọ́ wíwọ́pọ̀
Orúkọ, àmì-ìdámọ́, nọ́mbà molybdenum, Mo, 42
Ìpèlóhùn /ˌmɒlɪbˈdiːnəm/ MOL-ib-DEE-nəm, or /məˈlɪbdɨnəm/ mə-LIB-di-nəm
Ẹ̀ka ẹ́límẹ̀nti transition metal
Ẹgbẹ́, àsìkò, àdìpò 65, d
Ìwúwo átọ́mù 95.94
Ìtòléra ẹ̀lẹ́ktrónì [Kr] 5s1 4d5
2, 8, 18, 13, 1
Physical properties
Phase solid
Density (near r.t.) 10.28 g·cm−3
Liquid density at m.p. 9.33 g·cm−3
Melting point 2896 K, 2623 °C, 4753 °F
Boiling point 4912 K, 4639 °C, 8382 °F
Heat of fusion 37.48 kJ·mol−1
Heat of vaporization 617 kJ·mol−1
Molar heat capacity 24.06 J·mol−1·K−1
Vapor 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 6, 5, 4, 3, 2, 1[1], -1, -2
(strongly acidic oxide)
Electronegativity 2.16 (Pauling scale)
Ionization energies 1st: 684.3 kJ·mol−1
2nd: 1560 kJ·mol−1
3rd: 2618 kJ·mol−1
Atomic radius 139 pm
Covalent radius 154±5 pm
Miscellanea
Crystal structure body-centered cubic
Molybdenum has a body-centered cubic crystal structure
Magnetic ordering paramagnetic[2]
Electrical resistivity (20 °C) 53.4 nΩ·m
Thermal conductivity 138 W·m−1·K−1
Thermal expansion (25 °C) 4.8 µm·m−1·K−1
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 registry number 7439-98-7
Àwọn ísótòpù dídúró jùlọ
Main article: Àwọn ísótòpù molybdenum
iso NA half-life DM DE (MeV) DP
92Mo 14.84% 92Mo is stable with 50 neutrons
93Mo syn 4×103 y ε - 93Nb
94Mo 9.25% 94Mo is stable with 52 neutrons
95Mo 15.92% 95Mo is stable with 53 neutrons
96Mo 16.68% 96Mo is stable with 54 neutrons
97Mo 9.55% 97Mo is stable with 55 neutrons
98Mo 24.13% 98Mo is stable with 56 neutrons
99Mo syn 65.94 h β 0.436, 1.214 99m Tc{{{ps1}}}
γ 0.74, 0.36,
0.14
-
100Mo 9.63% 7.8×1018 y ββ 3.04 100Ru
· r


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