Question

The mass number of three atoms 31, 32, 34. Their atomic number are 15, 16, and 16 respectively which of these two isotopes and which two isotones? ​

Answer 1

Answer:

second and third are isotopes

first and second are isotones

Answer 2

Answer:

Isotopes with same atomic no. so 16,16

Isotones same no. of nuclides (A-Z) so

(31-15) and (32-16)