Rhodium
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45Rh
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Panagway
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silvery white metallic
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Kinatibuk-ang mga kinaiya
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Ngalan, simbolo, kaiphan
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rhodium, Rh, 45
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Paglitok
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]
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Kategoriyang elemento
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puthaw nga transisyon
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Group, period, block
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9, 5, d
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Gibug-aton sa atomo
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102.90550
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Kontorno sa elektron
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[Kr] 5s1 4d8 2, 8, 18, 16, 1
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History
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Pagkadiskobre
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William Hyde Wollaston (1804)
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First isolation
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William Hyde Wollaston (1804)
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Physical properties
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Phase
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magahi
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Density (near r.t.)
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12.41 g·cm−3
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Liquid density at m.p.
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10.7 g·cm−3
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Melting point
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2237 K, 1964 °C, 3567 °F
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Boiling point
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3968 K, 3695 °C, 6683 °F
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Heat of fusion
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26.59 kJ·mol−1
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Heat of vaporization
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494 kJ·mol−1
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Molar heat capacity
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24.98 J·mol−1·K−1
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Vapor pressure
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P (Pa)
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1
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10
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100
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1 k
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10 k
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100 k
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at T (K)
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2288
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2496
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2749
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3063
|
3405
|
3997
|
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Atomic properties
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Oxidation states
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6, 5, 4, 3, 2, 1, -1 (amphoteric oxide)
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Electronegativity
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2.28 (Pauling scale)
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Ionization energies
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1st: 719.7 kJ·mol−1
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2nd: 1740 kJ·mol−1
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3rd: 2997 kJ·mol−1
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Atomic radius
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134 pm
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Covalent radius
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142±7 pm
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Miscellanea
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Crystal structure
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face-centered cubic
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Magnetic ordering
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paramagnetic
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Electrical resistivity
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(0 °C) 43.3 nΩ·m
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Thermal conductivity
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150 W·m−1·K−1
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Thermal expansion
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(25 °C) 8.2 µm·m−1·K−1
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Speed of sound (thin rod)
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(20 °C) 4700 m·s−1
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Young's modulus
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380 GPa
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Shear modulus
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150 GPa
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Bulk modulus
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275 GPa
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Poisson ratio
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0.26
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Mohs hardness
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6.0
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Vickers hardness
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1246 MPa
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Brinell hardness
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1100 MPa
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CAS registry number
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7440-16-6
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Most stable isotopes
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Main article: Isotopes of rhodium
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|
· r
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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
- ↑ "Rhodium: rhodium(I) fluoride compound data". OpenMOPAC.net. Retrieved 2007-12-10.
- ↑ Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.
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