Question

Give the mass number of X and Y what is the relations between the two spcies​

Answer 1

Explanation:

What is the relation between the two species? Atomic mass of X = Number of protons + Number of neutrons = 6 + 6 = 12. Atomic mass of Y = Number of protons + Number of neutrons = 6 + 8 = 14. These two atomic species, X and Y, have the same atomic number but different mass numbers.