Rhodium

Rhodium, ₄₅Rh

Rhodium
Pípè	/ˈroʊdiəm/ ​(ROH-dee-əm)
Ìhànsójú	silvery white metallic
Ìwúwo átọ̀mù Ar, std(Rh)	102.90549(2)
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 ruthenium ← rhodium → palladium
Nọ́mbà átọ̀mù (Z)	45
Ẹgbẹ́	group 9
Àyè	àyè 5
Àdìpọ̀	Àdìpọ̀-d
Ẹ̀ka ẹ́límẹ́ntì	Transition metal
Ìtò ẹ̀lẹ́ktrọ́nù	[Kr] 4d8 5s1
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 16, 1
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	2237 K ​(1964 °C, ​3567 °F)
Ígbà ìhó	3968 K ​(3695 °C, ​6683 °F)
Kíki (near r.t.)	12.41 g/cm3
when liquid (at m.p.)	10.7 g/cm3
Heat of fusion	26.59 kJ/mol
Heat of	494 kJ/mol
Molar heat capacity	24.98 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, +3, +4, +5, +6 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 2.28
Atomic radius	empirical: 134 pm
Covalent radius	142±7 pm
Color lines in a spectral range Spectral lines of rhodium
Other properties
Natural occurrence	primordial
Crystal structure	​(fcc)
Speed of sound thin rod	4700 m/s (at 20 °C)
Thermal expansion	8.2 µm/(m·K) (at 25 °C)
Thermal conductivity	150 W/(m·K)
Electrical resistivity	43.3 n Ω·m (at 0 °C)
Magnetic ordering	paramagnetic
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 Number	7440-16-6
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 -