Palladium, 46 Pd Palladium Pípè / p ə ˈ l eɪ d i ə m / (pə-LAY -dee-əm ) Ìhànsójú silvery white metallic Ìwúwo átọ̀mù A r, std (Pd) 106.42(1) [ 1] Palladium ní orí tábìlì àyè
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 palladiumOther 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
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References
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↑ 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 .
↑ Magnetic susceptibility of the elements and inorganic compounds , in Handbook of Chemistry and Physics 81st edition, CRC press.