Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
$\left({ }_{32} \mathrm{Ge}^{76},{ }_{34} \mathrm{Se}^{76}\right) \text { and } \left.{(}_{14} \mathrm{Si}^{30},{ }_{16} \mathrm{S}^{32}\right) \text { are examples of }$
ChemistryClassification of Elements and Periodicity in PropertiesWBJEEWBJEE 2014
Options:
  • A isotopes and isobars
  • B isobars and isotones
  • C isotones and isotopes
  • D isobars and isotopes
Solution:
2354 Upvotes Verified Answer
The correct answer is: isobars and isotones
${ }_{32} \mathrm{Ge}^{76}$ and $\mathrm{sq} \mathrm{Se}^{76}$ have the same mass number but different atomic number, so they are isobars. Number of neutrons,
in $_{14} e^{\mathrm{Si}^{30}}=30-14=16$
in $_{16} e^{\mathrm{Si}^{32}}=32-16=16$
Because of the presence of same number of neutrons, $_{14} \mathrm{Si}^{30}$ and ${ }_{16} \mathrm{S}^{32}$ are called isotones.

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.