MCQ
Which of the following pair indicates isotopes?
  • ${ }_{17} \mathrm{Cl}^{35},{ }_{17} \mathrm{Cl}^{37}$
  • B
    ${ }_{18} \mathrm{Ar}^{40}{ }_{20} \mathrm{Ca}^{40}$
  • C
    ${ }_6 \mathrm{C}^{13}{ }_7 \mathrm{~N}^{14}$
  • D
    ${ }_{33} \mathrm{As}^{77},{ }_{34} \mathrm{Se}^{78}$

Answer

Correct option: A.
${ }_{17} \mathrm{Cl}^{35},{ }_{17} \mathrm{Cl}^{37}$

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