NO. 020Alkaline Earth

Ca

Calcium

Calcium is an essential metal for living organisms, forming the structural basis of bones and teeth. It also plays a role in muscle movement and cell signaling. Calcium is widely used in construction materials, metallurgy, and chemical manufacturing.

Crystal Structure

Face-centered cubic (fcc)

Technical Specifications

Atomic Mass40.078 u

Density1.54 g/cm³

Melting Point1115 K

Boiling Point1757 K

Atomic Radius197 pm

Electronegativity1

Ionization Energy590 kJ/mol

Electron Affinity2.4 kJ/mol

Bonding TypeMetallic

Oxidation States2

Acid/BaseBasic

ReactivityMedium

Electron Configuration

[Ar] 4s2

Discovered ByHumphry Davy

Year1808

Known Isotopes

Calcium-40Calcium-42Calcium-44