Calcium is in stalactites and stalagmites formed due to hard water, which contains dissolved calcium bicarbonate, that filters through the ground and reaches a cave and then precipitates outward.
Calcium:Part of All Life
- Essential to all living things, mainly for growth of healthy teeth and bones.
- Calcium phosphate is the main component of bone.
- The average human contains about 1 kilogram of calcium.
- Element 20
- Has atomic mass of 40.078 or 40.08
- Melting point -842°C, 1548°F, 1115 K
- Boiling point 1484°C, 2703°F, 1757 K
- Density (g cm−3) 1.54
Everyday Uses of Calcium
- calcium sulfate (gypsum) is used by builders as a plaster and by nurses for setting bones
- Calcium metal is used as a reducing agent in preparing other metals such as thorium and uranium.
- It is also used as an alloying agent for aluminium, beryllium, copper, lead and magnesium alloys.