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