Choose the pair of isobars from the following species

$A_{17}^{37}$ , $B_{17}^{30}, C_{18}^{37}, E_{19}^{38}$

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C and D

A and B

A and C

C and E

answer is B.

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Detailed Solution

A_{17}^{37}

and

C_{18}^{37}

are the pairs of isobars.
Isobars are atoms of different chemical elements with the same number of nucleons.
In the same way, isobars differ in atomic number but have the same mass number. Atoms of chemical elements having the same atomic mass but a different atomic number are called Isobars. The sum of the number of protons and neutrons simultaneously form the atomic mass. Hence, we can also say the number of nucleons present in the nucleus is equivalent to the atomic mass of an atom

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