The nuclei of which one of the following

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Target Exam

CUET

Subject

Physics

Chapter

Nuclei

Question:

The nuclei of which one of the following pairs of nuclei are isotones

Options:

${ }_{34} \mathrm{Se}^{74},{ }_{31} \mathrm{Ca}^{71}$

${ }_{42} M o^{92},{ }_{40} Z r^{92}$

${ }_{38} S r^{81},{ }_{38} S r^{86}$

${ }_{20} \mathrm{Ca}^{40},{ }_{16} \mathrm{~S}^{32}$

Correct Answer:

${ }_{34} \mathrm{Se}^{74},{ }_{31} \mathrm{Ca}^{71}$

Explanation:

These nuclei having different Z and A but equal (A – Z) are called isotones.