Palladium

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Palladium
46Pd
Ni

Pd

Pt
rhodiumpalladiumsilver
Ìhànsójú
silvery white metallic
Àwọn ìdámọ́ wíwọ́pọ̀
Orúkọ, àmì-ìdámọ́, nọ́mbà palladium, Pd, 46
Ìpèlóhùn /pəˈleɪdiəm/
pə-LAY-dee-əm
Ẹ̀ka ẹ́límẹ̀nti transition metal
Ẹgbẹ́, àsìkò, àdìpò 105, d
Ìwúwo átọ́mù 106.42
Ìtòléra ẹ̀lẹ́ktrónì [Kr] 4d10
2, 8, 18, 18
Physical properties
Phase solid
Density (near r.t.) 12.023 g·cm−3
Liquid density at m.p. 10.38 g·cm−3
Melting point 1828.05 K, 1554.9 °C, 2830.82 °F
Boiling point 3236 K, 2963 °C, 5365 °F
Heat of fusion 16.74 kJ·mol−1
Heat of vaporization 362 kJ·mol−1
Molar heat capacity 25.98 J·mol−1·K−1
Vapor 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, +4, +6
(mildly basic oxide)
Electronegativity 2.20 (Pauling scale)
Ionization energies 1st: 804.4 kJ·mol−1
2nd: 1870 kJ·mol−1
3rd: 3177 kJ·mol−1
Atomic radius 137 pm
Covalent radius 139±6 pm
Van der Waals radius 163 pm
Miscellanea
Crystal structure face-centered cubic
Palladium has a face-centered cubic crystal structure
Magnetic ordering paramagnetic[1]
Electrical resistivity (20 °C) 105.4 nΩ·m
Thermal conductivity 71.8 W·m−1·K−1
Thermal expansion (25 °C) 11.8 µm·m−1·K−1
Speed of sound (thin rod) (20 °C) 3070 m·s−1
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 registry number 7440-05-3
Àwọn ísótòpù dídúró jùlọ
Main article: Àwọn ísótòpù palladium
iso NA half-life DM DE (MeV) DP
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
· r


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.