The chemical symbol for calcium is Ca.
Calcium is a reactive alkaline earth metal, and it is essential for various biological functions in living organisms. In the periodic table, each element is represented by a unique one or two-letter symbol, and for calcium, the ‘Ca’ comes from its Latin name ‘Calx’, which means lime. The atomic number for calcium is 20, indicating that it has 20 protons in its nucleus. This symbol is used universally in chemical equations and discussions to represent calcium.