Periodic Table of Elements




Cadmium was discovered by German chemist Friedrich Stromeyer (1776-1835) in 1817 in Germany, as an impurity in zinc carbonate.

Name: Cadmium
Symbol: Cd
Atomic number: 48
Atomic weight: 112.41
State: solid
Group, period, block: 12, 5, d
Color: silvery bluish-gray metallic
Classification: transition metal
Electron configuration: 4d10 5s2

Physical properties

Density: 8.65 g/cm-3
Melting point: 594.22 K, 321.07 C, 609.93 F
Boiling point: 1040 K, 767 C, 1413 F

Atomic properties

Oxidation states: 2, 1
Electronegativity: 1.69 (Pauling scale)
Ionization energies: 1st: 867.8 kJmol-1
Covalent radius: 1449 pm
Van der Waals radius: 158 pm
  • Cd
  • Electron Configuration


There are eight naturally occurring isotopes of cadmium exist, 106Cd, 108Cd, 110Cd, 111Cd, 112Cd, 113Cd, 114Cd, and 116Cd.