Question

Identify the pair of isotopes from the following:

\(^{16}_8X\), \(^{16}_7X\), \(^{17}_8X\)

Answer 1

\(^{16}_8X,\,\, ^{17}_8X\)are a pair of isotopes as they have a same atomic number but a different mass number. 

Here 8 is the atomic number and 16, 17 are a mass number which is different so these are isotopes.