Facts about Calcium

Atomic symbol: Ca

Atomic number: 20

Atomic mass: 40.078

Form in natural state: Solid

Element Classification: Metal (Alkaline Earth

Metal)

Physical properties: A silvery white, soft metal

that tarnishes rapidly in air and reacts with water

How common is it on earth: Calcium is the fifth

most abundant element in earths crust. 4.2% of

the earths soil, air and oceans.

Does it form any compounds? Yes, Calcium Stearate, Calcium Arsenate, Calcium Carbonate, Calcium Bromide, Calcium Nitride, Calcium Chloride, Hydroxylapatite

What is its electron configuration? 4s2 (1s2, 2s2, 2p6, 3s2, 3p6, 4s2)

Melting Point: 1115 K (842°C or 1548°F)

Boiling Point: 1757 K (1484°C or 2703°F

Calcium is a highly reactive element. As well as being in group 2a, calcium has 2e- valence electrons