The nuclear structures of some atoms are as follows-
$(i) 8 p + 2 n$ $(i i) 8 p + 22 n$
$(i i i) 18 p + 22 n$ $(i v) 20 p + 20 n$
from these isobaric are-

(i)

and

(i i)

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(i)

and

(i i i)

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(i i i)

and

(i v)

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(i)

and

(i v)

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Solution

The correct option is B $(i i i)$ and $(i v)$
Isobars are atoms of different chemical elements that have the same number of nucleons.
Correspondingly, isobars differ in atomic number (or number of protons) but have the same mass number.
(iii) and (iv) atoms have different atomic numbers but same atomic mass that is 40.
Mass number = No.of protons + No.of Neutrons.
So answer is C.

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Similar questions

Which of the following are isobars?

$_{18}^{40} A r$ $_{6}^{14} C$ $_{20}^{40} C a$ $_{7}^{14} N$

Which of the following are isobars?

$_{18}^{40} A r$ , $_{6}^{14} C$ , $_{20}^{40} C a$ , $_{7}^{14} N$

Which of the following are isobars?

i) $_{18}^{40} A r$
ii) $_{6}^{14} C$
iii) $_{20}^{40} C a$
iv) $_{7}^{14} N$

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)

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