Periodic Table
46
Pd
106.42
Palladium
Transition MetalUnique config [Kr]4d¹⁰ (no 5s!); absorbs H₂; catalyst.
Electronic Configuration
[Kr] 4d¹⁰or1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 4d¹⁰
Electron shells
2e⁻n=1
8e⁻n=2
18e⁻n=3
18e⁻n=4
Properties
Atomic number
46
Atomic mass
106.42 u
Category
Transition Metal
Block / Group / Period
d · 10 · 5
Valence electrons
0
Oxidation states
+2, +4
Electronegativity
2.2
Atomic radius
169 pm
Ionization energy
804 kJ/mol
Electron affinity
54 kJ/mol
Melting point
1828 K / 1555 °C
Boiling point
3236 K / 2963 °C
Density
12.02 g/cm³
State at 25 °C
solid
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