Rhenium

Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
Lọ sí: atọ́ka, àwárí
Rhenium
75Re
Tc

Re

Bh
tungstenrheniumosmium
Ìhànsójú
grayish white
Àwọn ìdámọ́ wíwọ́pọ̀
Orúkọ, àmì-ìdámọ́, nọ́mbà rhenium, Re, 75
Ẹ̀ka ẹ́límẹ̀nti transition metal
Ẹgbẹ́, àsìkò, àdìpò 76, 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
Rhenium has a hexagonal crystal structure
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
iso NA half-life DM DE (MeV) DP
185Re 37.4% 185Re is stable with 110 neutrons
187Re 62.6% 4.35×1010 y α (not observed) 1.653 183Ta
β- 0.0026 187Os
· r


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81th edition, CRC press.