Rhenium
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| Rhenium |
|
75Re
|
|
|
| Ìhànsójú |
grayish white
 |
| Àwọn ìdámọ́ wíwọ́pọ̀ |
| Orúkọ, àmì-ìdámọ́, nọ́mbà |
rhenium, Re, 75 |
| Ẹ̀ka ẹ́límẹ̀nti |
transition metal |
| Ẹgbẹ́, àsìkò, àdìpò |
7, 6, d |
| Ìwúwo átọ́mù |
186.207 |
| Ìtòléra ẹ̀lẹ́ktrónì |
[Xe] 4f14 5d5 6s2
2, 8, 18, 32, 13, 2 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
21.02 g·cm−3 |
| Liquid density at m.p. |
18.9 g·cm−3 |
| Melting point |
3459 K, 3186 °C, 5767 °F |
| Boiling point |
5869 K, 5596 °C, 10105 °F |
| Heat of fusion |
60.43 kJ·mol−1 |
| Heat of vaporization |
704 kJ·mol−1 |
| Molar heat capacity |
25.48 J·mol−1·K−1 |
| Vapor pressure |
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T (K) |
3303 |
3614 |
4009 |
4500 |
5127 |
5954 |
|
| Atomic properties |
| Oxidation states |
7, 6, 5, 4, 3, 2, 1, 0, -1
(mildly acidic oxide) |
| Electronegativity |
1.9 (Pauling scale) |
Ionization energies
(more) |
1st: 760 kJ·mol−1 |
| 2nd: 1260 kJ·mol−1 |
| 3rd: 2510 kJ·mol−1 |
| Atomic radius |
137 pm |
| Covalent radius |
151±7 pm |
| Miscellanea |
| Crystal structure |
hexagonal
|
| Magnetic ordering |
paramagnetic[1] |
| Electrical resistivity |
(20 °C) 193 nΩ·m |
| Thermal conductivity |
48.0 W·m−1·K−1 |
| Thermal expansion |
6.2 µm/(m·K) |
| Speed of sound (thin rod) |
(20 °C) 4700 m·s−1 |
| Young's modulus |
463 GPa |
| Shear modulus |
178 GPa |
| Bulk modulus |
370 GPa |
| Poisson ratio |
0.30 |
| Mohs hardness |
7.0 |
| Vickers hardness |
2450 MPa |
| Brinell hardness |
1320 MPa |
| CAS registry number |
7440-15-5 |
| Àwọn ísótòpù dídúró jùlọ |
| Main article: Àwọn ísótòpù rhenium |
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· r |
