Cadmium
Transition Metal
Cadmium (Cd) is a chemical element with atomic number 48, classified as a transition metal. At room temperature it is a solid. It was discovered in 1817 by Karl Samuel Leberecht Hermann, Friedrich Stromeyer.
Properties
- Atomic number
- 48
- Atomic mass
- 112.41 u
- Category
- Transition Metal
- Group
- 12
- Period
- 5
- Block
- d-block
- Electron configuration
- [Kr] 4d¹⁰ 5s²
- Phase at STP
- Solid
- Density
- 8.69 g/cm³
- Melting point
- 594.22 K (321.1 °C)
- Boiling point
- 1040 K (766.9 °C)
- Electronegativity
- 1.69
- Atomic radius
- 161 pm
- Ionization energy
- 8.994 eV
- Discovery
- 1817 · Karl Samuel Leberecht Hermann, Friedrich Stromeyer
Common uses
Batteries, pigments, coatings, nuclear reactors
Did you know?
Highly toxic but essential for some rechargeable batteries.