Question

Composition of the nuclei of two atomic species A and B are given as under :

element. A. B
protons. 17. 17
Neutrons. 18. 20

(i) What are the mass numbers of A and B?
(ii) How are they related to each other?​

Answer 1

Answer:

Explanation:

i) mass number of A: 17+18= 35

  mass number of B: 17+20= 37

ii) elements A and B are isotopes on chlorine and the occur naturally in the            ratio of 3:1 (75% : 25%)

there ya go :))