If mass of one atom is 3.32 x 10^-23g, then calculate number of nucleons (neutrons and protons) present in 2 atoms of the element :

Number of nucleons =mass number.
Molar mass of element
= 3.32 x 10^-23 x 6.02 x 10²³
= 20 = mass number.
So, number of nucleons in 2 atoms = 40