Calcium

Alkaline earth metal

Symbol: Ca

Atomic Number: 20

Standard State: Solid

Atomic Mass: 40.08

Electron Configuration: [Ar]4s2

Electronegativity: 1

Atomic Radius: 231

Ionization Energy: 6.113

Melting Point: 1115

Boiling Point: 1757

Density: 1.54

Year Discovered: Ancient