Calcium

Element

Characteristics

1)It is teh fifth most abundant element in the earth's crust

2)Atomic number:20

3)Phase at room tmperature: Solis

4)ATomic weight: 40.078

5)periodic number:4

6)Group number:2

Uses

1) Calcium is used to remove oxygen, sulfur , and certain alloys.

2)Used in some chemical processes to refine thorium,uranium and zirconium.

3)Used in vacuum tubes to remove trace gases.

4)Calcium compounds are used in making glass, brick,paint,paper and rubber.

5)Calcium is also used to gain stronge bones inside the human body.

History

Sir humphry Davy was tthe first to discover calcium in 1808.

Calcium metal wasn't abundant till the begining of the 20th century.

It was isolated by the electrolysis of a lime mixture and mercuric oxide.