Question

The four atomic species can be represented as follows. Out of these, the two species which can be termed isobars are :

(i)`""_60^201"X"`

(ii)`""_61^200"X"`

(iii)`""_58^200"X"`

(iv)`""_60^203"X"`

Options

• (i) and (ii)

• (ii) and (iii)

• (i) and (iii)

• (i) and (iv)

Answer 1

(b) (ii) and (iii)

`""_61^200"X"` and `""_58^200"X"` are isobars because they have the same mass number but different atomic numbers.