Atomic Element Z = 48 • Transition Metal
Cadmium (Cd) — Atomic Data, Electron Shells & Reactions
Cadmium (symbol Cd, atomic number 48) has a standard atomic weight of 112.41 u and ground-state configuration [Kr] 4d10 5s2.
Atomic Number (Z)
48
IUPAC Symbol
Cd
Standard Atomic Weight
112.41 g/mol
Period / Group / Block
5 / 12 / d-block
Condensed Electron Config
[Kr] 4d10 5s2
Full Subshell Config
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2
Principal Shell Occupancy
[2, 8, 18, 18, 2]
Pauling Electronegativity
1.69
First Ionization Energy
868 kJ/mol
Covalent Radius
144 pm
Melting Point
594.22 K (321.07 °C)
Boiling Point
1040 K (766.85 °C)
Density
8.69 g/cm³
Oxidation States
+2
Cd (Z=48) — Valence shell highlighted in vermilion