Renyo

Rhenium
75Re
Tc ↑ Re ↓ Bh Periodic table tungsten ← rhenium → osmium
Appearance
silvery-white
General properties
Name, simbolo, kaiphan	rhenium, Re, 75
Pronunciation	Plantilya:IPAc-en Plantilya:Respell
Element category	puthaw nga transisyon
Group, period, block	7, 6, d
Standard atomic weight	186.207
Electron configuration	[Xe] 4f14 5d5 6s2 2, 8, 18, 32, 13, 2
History
Discovery	Masataka Ogawa (1908)
First isolation	Masataka Ogawa (1908)
Named by	Walter Noddack, Ida Noddack, Otto Berg (1922)
Physical properties
Phase	magahi
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
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
Most stable isotopes
Main article: Isotopes of rhenium
iso NA half-life DM DE (MeV) DP 185Re 37.4% 185Re is stable with 110 neutrons 187Re 62.6% 4.12×1010 y α 1.653 183Ta β− 0.0026 187Os

Ang renyo (Iningles rhenium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Re ug kaiphan nga atomik 75. Ang renyo mao ang puthaw nga transisyon.

Galeriya sa hulagway

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