Rodyo

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Rhodium
45Rh
Co

Rh

Ir
rutheniumrhodiumpalladium
Appearance
silvery white metallic
General properties
Name, simbolo, kaiphan rhodium, Rh, 45
Pronunciation Plantilya:IPAc-en Plantilya:Respell
Element category puthaw nga transisyon
Group, period, block 95, d
Standard atomic weight 102.90550
Electron configuration [Kr] 5s1 4d8
2, 8, 18, 16, 1
Electron shells of rhodium (2, 8, 18, 16, 1)
History
Discovery William Hyde Wollaston (1804)
First isolation William Hyde Wollaston (1804)
Physical properties
Phase magahi
Density (near r.t.) 12.41 g·cm−3
Liquid density at m.p. 10.7 g·cm−3
Melting point 2237 K, 1964 °C, 3567 °F
Boiling point 3968 K, 3695 °C, 6683 °F
Heat of fusion 26.59 kJ·mol−1
Heat of vaporization 494 kJ·mol−1
Molar heat capacity 24.98 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 2288 2496 2749 3063 3405 3997
Atomic properties
Oxidation states 6, 5, 4, 3, 2, 1[1], -1
(amphoteric oxide)
Electronegativity 2.28 (Pauling scale)
Ionization energies 1st: 719.7 kJ·mol−1
2nd: 1740 kJ·mol−1
3rd: 2997 kJ·mol−1
Atomic radius 134 pm
Covalent radius 142±7 pm
Miscellanea
Crystal structure face-centered cubic
Rhodium has a face-centered cubic crystal structure
Magnetic ordering paramagnetic[2]
Electrical resistivity (0 °C) 43.3 nΩ·m
Thermal conductivity 150 W·m−1·K−1
Thermal expansion (25 °C) 8.2 µm·m−1·K−1
Speed of sound (thin rod) (20 °C) 4700 m·s−1
Young's modulus 380 GPa
Shear modulus 150 GPa
Bulk modulus 275 GPa
Poisson ratio 0.26
Mohs hardness 6.0
Vickers hardness 1246 MPa
Brinell hardness 1100 MPa
CAS registry number 7440-16-6
Most stable isotopes
Main article: Isotopes of rhodium
iso NA half-life DM DE (MeV) DP

Plantilya:Infobox element/isotopes decay2 Plantilya:Infobox element/isotopes decay3 Plantilya:Infobox element/isotopes decay2 Plantilya:Infobox element/isotopes decay2 Plantilya:Infobox element/isotopes decay4 Plantilya:Infobox element/isotopes stable Plantilya:Infobox element/isotopes decay2

t  h  u
· r

Ang rodyo (Iningles rhodium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Rh ug kaiphan nga atomik 45. Ang rodyo mao ang puthaw nga transisyon.

Ang mga gi basihan niini[usba | edit source]

  1. Rhodium: rhodium(I) fluoride compound data. OpenMOPAC.net. Retrieved on 2007-12-10.
  2. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.


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