Question

please answer this question

Answer 1

1.The atomic number of A is 17
2.The atomic mass number of B is 37u
3.Both are isotopes of the same element
4. 2,8,7
5.Chlorine

Answer 2

Answer:

1. 17
2. 36
3. isobars
4. 3p⁵
5. cl35 and cl47