Composition of the nuclei of two atomic species A and B is given as under : A BProtons : 18 20Neutrons : 22 20Give the mass numbers of A and B. What is the relation between the two species and which element or elements they represent ?

Academic Chemistry NCERT Class 9

Mass number is the sum of the number of neutrons and the number of protons. So, mass number of A and B is 40. As the mass number of A and B is same, hence they are isobars.

A represents Argon (⁴⁰₁₈Ar) while B represents (⁴⁰₂₀Ca) Calcium.

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Updated on: 10-Oct-2022

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