Calcium
Ca
Calcium
The element name is Calcium and its symbol is Ca. The atomic number is 20 and its mass number is 40.078. The period number is 4 and the group number is 2. Calcium is an Alkaline Earth Metal. The state of matter is solid. Calcium is a metal.
Chalk
Chalk is used by teachers on blackboards and used by kids on cement or other places for writing or drawing.
Cement
Cement is used to make sidewalks and other things of relation to architecture.
Calcium vitamins
Calcium vitamins are for making the body stronger. Calcium can also be found in bones and are essential to the body.