Calcium (Ca)
An alkaline earth metal, fifth most abundant element in the Earth's crust.
It's responsible for making chalk, limestone, and your bones.
Element properties
- Atomic number
- 20
- Symbol
- Ca
- Atomic mass
- 40.078 u
- Category
- Alkaline Earth Metal
- Period
- 4
- Group
- 2
- Block
- s
- State
- Solid
- Electron configuration
- [Ar] 4s2
- Electronegativity (Pauling)
- 1
- Density
- 1.55 g/cm³
- Melting point
- 842 °C
- Boiling point
- 1484 °C
Uses
- Cement
- Plaster
- Dietary supplements