Calcium has 20 electrons and 20 neutrons. Calcium, obtainable from items like limestone, chalk and marble, was first discovered in 1808 by Sir Humphrey Davy.
The element of calcium is atomic number 20 on the periodic table and the symbol for it is Ca. It contains a silver color in its natural form. Calcium is naturally found in bones and shells. It is also used as an additive in many foods and beverages. Calcium has a melting point of 1542 degrees Fahrenheit and a boiling point of 2703 F. The name calcium was derived from the Latin word "calcis," which means lime.