Question

Composition of the nuclei of the two atomic species A and B are given below ; A protons 6. B protons 6. Neutrons. A protons 6. B Neutrons 8

Answer 1

it is an isotope of carbon c 6-12 and c 6-14

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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