Composition of the nuclei of two atomic species X and Y are given as under
X Y
Protons = 6 6
Neutrons= 6 6
Give the mass numbers of X and Y. What is the relation between the two species?
Mass number of X = 6+6 = 12
Mass number of Y = 6+8 = 14
Since X and Y both have atomic numbers as 6 but mass numbers are different, therefore, these are isotopes to each other.