Paladyo

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Palladium
46Pd
Ni

Pd

Pt
rhodiumpalladiumsilver
Appearance
silvery white
General properties
Name, simbolo, kaiphan palladium, Pd, 46
Pronunciation Plantilya:IPAc-en
Plantilya:Respell
Element category puthaw nga transisyon
Group, period, block 105, d
Standard atomic weight 106.42
Electron configuration [Kr] 4d10
2, 8, 18, 18
Electron shells of palladium (2, 8, 18, 18)
History
Discovery William Hyde Wollaston (1803)
First isolation William Hyde Wollaston (1803)
Physical properties
Phase magahi
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 310 MPa
CAS registry number 7440-05-3
Most stable isotopes
Main article: Isotopes of 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% >6×1017 y ββ - 110Cd
t  h  u
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Ang paladyo (Iningles palladium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Pd ug kaiphan nga atomik 46. Ang paladyo mao ang puthaw nga transisyon.

Ang mga gi basihan niini[usba | edit source]

  1. Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5. 


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