Atomic symbol: Ca
Atomic number: 20
Atomic mass: 40.08
Appearance: Dull gray, silver solid at 25°C
Series: Alkaline earth metals
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
3rd most abundant metal, after iron and aluminum.
Essential to the human body in relatively large quantities.
Burns with an orange-red flame.
Fun Fact! The average human contains approximately 1kg of calcium, of which 99% is stored in our bones.