All chemical elements

Symbol

Ca

Atomic number

20

Chemical property

Alkaline earth metal

Origin o the name

the Latin calx, 'lime'

Group

2

Period

4

Atomic weight (u)

40.078

Atomic weight uncertainty (u)

0.004

Density (g/cm³)

1.54

Melting point (K)

1115

Boiling point (K)

1757

Heat capacity (J/(g·K))

0.647

Electro-negativity

1

Abundance in earth's crust (mg/kg)

41500