Symbol
Ca
Atomic Number
20
Atomic Mass
40.078
Protons
20
Neutrons
20
Electrons
20
Type
Alkaline Earth Metal
Isotopes
Calcium-40, Calcium-42, Calcium-43, Calcium-44, Calcium-46
Discovery Year
1808
Discovered By
Humphry Davy
Group
2
Period
4
Boiling Point
2703°F
Melting Point
1548°F
Electron Configuration
[Ar] 4s²
Density (g/cm³)
1.55
Crystal Structure
Face-centered cubic
Magnetism
Diamagnetic
Abundance in Earth's Crust
4.15%
Phase at Room Temperature
Solid