Molybdenum

Molybdenum, ₄₂Mo

Molybdenum
Pípè	/məˈlɪbdənəm/ ​(mə-LIB-dən-əm)
Ìhànsójú	gray metallic
Ìwúwo átọ̀mù Ar, std(Mo)	95.95(1)
Molybdenum ní orí tábìlì àyè
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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, +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
Spectral lines of molybdenum
Other 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
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
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 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 β−β− 3.04 100Ru