Question

Composition of the nuclei
two elements species x and why are given as under
X. Y
protein. 6. 6
Neutrons. 6. 8

Answer 1

Carbon and oxygen are the elements species

Answer 2

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Mass number of X = Number of protons + Number of neutrons

= 6 + 6

= 12

Mass number 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. Hence, they are isotopes.

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