Palladium

Palladium, ₄₆Pd

Palladium
Pípè	/pəˈleɪdiəm/ ​(pə-LAY-dee-əm)
Ìhànsójú	silvery white metallic
Ìwúwo átọ̀mù Ar, std(Pd)	106.42(1)[1]
Palladium 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 Ni ↑ Pd ↓ Pt rhodium ← palladium → silver
Nọ́mbà átọ̀mù (Z)	46
Ẹgbẹ́	group 10
Àyè	àyè 5
Àdìpọ̀	Àdìpọ̀-d
Ẹ̀ka ẹ́límẹ́ntì	Transition metal
Ìtò ẹ̀lẹ́ktrọ́nù	[Kr] 4d10
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 18
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	1828.05 K ​(1554.9 °C, ​2830.82 °F)
Ígbà ìhó	3236 K ​(2963 °C, ​5365 °F)
Kíki (near r.t.)	12.023 g/cm3
when liquid (at m.p.)	10.38 g/cm3
Heat of fusion	16.74 kJ/mol
Heat of	362 kJ/mol
Molar heat capacity	25.98 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1721 1897 2117 2395 2753 3234
Atomic properties
Oxidation states	0, +1, +2, +3, +4 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 2.20
Atomic radius	empirical: 137 pm
Covalent radius	139±6 pm
Van der Waals radius	163 pm
Color lines in a spectral range Spectral lines of palladium
Other properties
Natural occurrence	primordial
Crystal structure	​(fcc)
Speed of sound thin rod	3070 m/s (at 20 °C)
Thermal expansion	11.8 µm/(m·K) (at 25 °C)
Thermal conductivity	71.8 W/(m·K)
Electrical resistivity	105.4 n Ω·m (at 20 °C)
Magnetic ordering	paramagnetic[2]
Young's modulus	121 GPa
Shear modulus	44 GPa
Bulk modulus	180 GPa
Poisson ratio	0.39
Mohs hardness	4.75
Vickers hardness	461 MPa
Brinell hardness	37.3 MPa
CAS Number	7440-05-3
Main isotopes of palladium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 100Pd syn 3.63 d ε - 100Rh γ 0.084, 0.074, 0.126 - 102Pd 1.02% 102Pd is stable with 56 neutrons 103Pd syn 16.991 d ε - 103Rh 104Pd 11.14% 104Pd is stable with 58 neutrons 105Pd 22.33% 105Pd is stable with 59 neutrons 106Pd 27.33% 106Pd is stable with 60 neutrons 107Pd trace 6.5×106 y β− 0.033 107Ag 108Pd 26.46% 108Pd is stable with 62 neutrons 110Pd 11.72% 110Pd is stable with 64 neutrons
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