Question

Atom A has a mass number 209 and atomic number 82.How

many protons and neutrons are present in an atom A?​

Answer 1

Answer:

Solution. (i) A has 82 protons as the atomic number is 82. (ii) B has 83 protons as the atomic number is 83. (iii) No, A and B are not isotopes of each other because their atomic numbers are not same.

Answer 2

Answer: (i) 82 (ii) 83 (ii) No