Calcium with atomic number 20 is represented in the periodic table with the symbol Ca.
Mass of one atom of calcium
The molar mass of the calcium = 40 g/mol
The avogadro number = 6.022 x 1023
The mass of one atom of calcium is the same as the molar mass of the calcium.
∴ The mass of one atom of calcium = 40 g
Also, the atomic mass of calcium is 40.078 g/mol.