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

(a) ${}_{60}^{201}X$

(b) ${}_{61}^{200}X$

(c) ${}_{58}^{200}X$

(d) ${}_{60}^{203}X$

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Solution

(b) (ii) and (iii)

${}_{61}^{200}X and {}_{58}^{200}X$ are isobars because they have the same mass number but different atomic numbers.

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Similar questions

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) $_{58}^{200}$ (iv) $_{60}^{203} X$

(a) (i) and (ii)

(b) (ii) and (iii)

(d) (i) and (iv)

(a) they have different chemical properties

(b) their physical properties are the same

(d) they are isobars of the same element

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