Rhodium

Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
Jump to navigation Jump to search
Rhodium, 45Rh
Rhodium powder pressed melted.jpg
Rhodium
Pípè /ˈrdiəm/ (ROH-dee-əm)
Ìhànsójúsilvery white metallic
Ìwúwo átọ̀mù Ar, std(Rh)102.90549(2)[1]
Rhodium ní orí tábìlì àyè
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
Co

Rh

Ir
rutheniumrhodiumpalladium
Nọ́mbà átọ̀mù (Z)45
Ẹgbẹ́group 9
Àyèàyè 5
Àdìpọ̀Àdìpọ̀-d
Ẹ̀ka ẹ́límẹ́ntì  Transition metal
Ìtò ẹ̀lẹ́ktrọ́nù[Kr] 4d8 5s1
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 18, 16, 1
Àwọn ohun ìní ara
Ìfarahàn at STPsolid
Ìgbà ìyọ́2237 K ​(1964 °C, ​3567 °F)
Ígbà ìhó3968 K ​(3695 °C, ​6683 °F)
Kíki (near r.t.)12.41 g/cm3
when liquid (at m.p.)10.7 g/cm3
Heat of fusion26.59 kJ/mol
Heat of 494 kJ/mol
Molar heat capacity24.98 J/(mol·K)
 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−3, −1, 0, +1,[2] +2, +3, +4, +5, +6 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: 2.28
Atomic radiusempirical: 134 pm
Covalent radius142±7 pm
Color lines in a spectral range
Spectral lines of rhodium
Other properties
Natural occurrenceprimordial
Crystal structure ​(fcc)
Face-centered cubic crystal structure for rhodium
Speed of sound thin rod4700 m/s (at 20 °C)
Thermal expansion8.2 µm/(m·K) (at 25 °C)
Thermal conductivity150 W/(m·K)
Electrical resistivity43.3 n Ω·m (at 0 °C)
Magnetic orderingparamagnetic[3]
Young's modulus380 GPa
Shear modulus150 GPa
Bulk modulus275 GPa
Poisson ratio0.26
Mohs hardness6.0
Vickers hardness1246 MPa
Brinell hardness1100 MPa
CAS Number7440-16-6
Main isotopes of rhodium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
99Rh syn 16.1 d ε - 99Ru
γ 0.089, 0.353,
0.528
-
101mRh syn 4.34 d ε - 101Ru
IT 0.157 101Rh
γ 0.306, 0.545 -
101Rh syn 3.3 y ε - 101Ru
γ 0.127, 0.198,
0.325
-
102mRh syn 2.9 y ε - 102Ru
γ 0.475, 0.631,
0.697, 1.046
-
102Rh syn 207 d ε - 102Ru
β+ 0.826, 1.301 102Ru
β 1.151 102Pd
γ 0.475, 0.628 -
103Rh 100% 103Rh is stable with 58 neutrons
105Rh syn 35.36 h β 0.247, 0.260,
0.566
105Pd
γ 0.306, 0.318 -
Àdàkọ:Category-inline
| references


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305. 
  2. "Rhodium: rhodium(I) fluoride compound data". OpenMOPAC.net. Retrieved 2007-12-10. 
  3. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.
  4. "Rhodium: rhodium(I) fluoride compound data". OpenMOPAC.net. Retrieved 2007-12-10.