48 · Cd
Cadmium
Identified by Stromeyer in 1817.
Identity
- Atomic number
- 48
- Symbol
- Cd
- Canonical name
- Cadmium
- Category
- transition metal
- Group
- 12
- Period
- 5
- Block
- d
Properties
These quantities come from the Periodic Table JSON compilation. They have not yet been checked, one by one, against CIAAW atomic weights or NIST measurements. A value marked estimated is not a measurement.
- Atomic mass
- 112.4144 u
- Electron configuration
- [Kr] 4d10 5s2
- Electrons per shell
- 2, 8, 18, 18, 2
- Standard state
- solid
- Density
- 8.65 g/cm³
- Melting point
- 594.22 K
- Boiling point
- 1,040 K
- Electronegativity
- 1.69 Pauling
- First ionization energy
- 867.8 kJ/mol
- Electron affinity
- -68 kJ/mol
History
An impurity in zinc carbonate
Discovery · confirmed · 1817
Stromeyer identifies cadmium in a zinc carbonate. Other chemists report it the same year.
Etymology
- Theme
- mythology
- Language
- grec
- Root
- Kadmeia
- Meaning
- Cadmus
Scientists
See also
Sources
- IUPAC, Periodic Table of the Elements
- Bowserinator, Periodic Table JSON. Compilation secondaire d’où viennent les grandeurs physiques importées (masse, densité, températures, énergies). Elles ne sont pas revérifiées une à une auprès du NIST ou de la CIAAW.
- John Emsley, Nature’s Building Blocks: An A–Z Guide to the Elements