Periodic Table
48
Cd
112.41
Cadmium
Transition MetalToxic; Ni–Cd batteries; yellow CdS pigment.
Electronic Configuration
[Kr] 4d¹⁰ 5s²or1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 4d¹⁰ 5s²
Electron shells
2e⁻n=1
8e⁻n=2
18e⁻n=3
18e⁻n=4
2e⁻n=5
Properties
Atomic number
48
Atomic mass
112.41 u
Category
Transition Metal
Block / Group / Period
d · 12 · 5
Valence electrons
2
Oxidation states
+2
Electronegativity
1.69
Atomic radius
161 pm
Ionization energy
868 kJ/mol
Electron affinity
0 kJ/mol
Melting point
594 K / 321 °C
Boiling point
1040 K / 767 °C
Density
8.69 g/cm³
State at 25 °C
solid
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