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Isoelectronic species differ from one another in their:
AElectron count
BValence count
CTotal charge
DNuclear charge
Answer & Solution
Correct answer: D. Nuclear charge
1. These species share the same number of electrons.
2. Something else must set them apart.
3. Their nuclear charges differ.
_Source: NCERT Class 11 Chemistry Part I, Chapter 3, Classification of Elements and Periodicity in Properties._
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