Cadmium

Atomic number

48

Atomic mass (u)

112.41

Category

Transition metal

Standard state

Solid

Melting point

321.07 °C (594.22 K)

Boiling point

766.85 °C (1040 K)

Density (g/cm³)

8.69

Electronegativity (Pauling)

1.69

Electron configuration

[Kr]5s2 4d10

Oxidation states

+2

Atomic radius (pm)

158

First ionization energy (eV)

8.994

Discovery & recognition

Discovery year / period (PubChem)

1817

Discovery credited to (RSC)

Friedrich Stromeyer

Date or period recorded by RSC

1817

Discovery place

Göttingen, Germany; also studied in Halle and Berlin

An ancient date does not identify a first human discovery. Different references may date observation, isolation and formal recognition differently.

Natural occurrence & production

The creation of an element’s nuclei and its concentration into terrestrial deposits are different processes. The occurrence note below concerns its presence or production on Earth; it is not a complete account of nucleosynthesis.

“The only mineral containing significant quantities of cadmium is greenockite (cadmium sulfide).”

Royal Society of Chemistry · occurrence excerpt ↗

Continue the research

Reference values are not product specifications. Blank values have not been estimated. For superheavy elements, some properties and family assignments are theoretical or incompletely measured.