Meaning of CALCIUM in English
Atomic number: 20
Atomic weight: 40.078 (4) g
Group in periodic table: 2
Group name: Alkaline earth metal
Period in periodic table: 4
Block in periodic table: s-block
CAS registry ID: 7440-70-2
Calcium is a metallic element, fifth in abundance in the earth's crust, of which it forms more than 3%. It is an essential constituent of leaves, bones, teeth, and shells.
The metal is a silvery colour and is rather hard. Chemically it is one of the alkaline earth elements; it readily forms a white coating of nitride in air, reacts with water, burns with a yellow-red flame, forming largely the nitride.
Calcium does not occur free in nature. Calcium is found mostly as limestone, gypsum and fluorite. Stalagmites and stalactites contain calcium carbonate.
Chemistry of the elements English vocabulary. Английский словарь химии элементов. 2012