Cadmium was discovered by Friedrich Stromeyer in 1817 from an impurity in some samples of zinc carbonate.

Physical Properties

Mechanical Properties

  • Density Of A Solid: 8650 kg m‑3
  • Molar Volume: 13.00 cm3
Elastic Properties

  • Young's Modulus: 50 GPa
  • Rigidity modulus: 19 GPa
  • Bulk modulus: 42 GPa
  • Poisson's ratio: 0.30( no units )

  • Mineral Hardness: 2.0 ( no units )
  • Brinell Hardness: 203 MN m-2
  • Vicker's Hardness: (no data) MN m-2


Cadmium is in groups 2 & 13 on the periodic table.

Atomic number & mass

Atomic Number: 48

Mass: 112.411 + - 0.008 u

Protons, neutrons, electrons

Protons; 48

Electrons; 48

Neutrons; 64



Where it's found in nature.

In it's purest for, cadmium is a silvery white color, malleable metal with a bluish hue. It's found naturally in the earth's crust & is a rare metal. It's number 67 in abundance among the 90 naturally occurring elements on Earth

Cadmiums uses.

Most cadmium is used in this country is obtained as a by-product (formed while making something else) from smelting (melting) zinc, lead, or copper ores. Its used in metal plating, and to make pigments, batteries, and plastics.

Chemical Properties

Electronegativity according to Pauling



8.7 at 20°C

Melting point

321 °C

Boiling point

767 °C

Vanderwaals radius

0.154 nm

Ionic radius

0.097 nm (+2)



Electronic shell

[ Kr ] 4d10 5s2

Energy of first ionisation

866 kJ.mol -1

Energy of second ionisation

1622 kJ.mol -1

Standard potential

-0.402 V