Molybdenum
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| Molybdenum |
|
42Mo
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|
| 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 |
6, 5, 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
|
| 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 |
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· r |
