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Which one of the following groups represent a collection of isoelectrionic species?
(At. No. Cs=55,Bt=35)
A. `N^(3-),F^(-),Na^(+)`
B. `Be,Al^(3+),Cl^(-)`
C. `Ca^(2+),Cs^(+),Br`
D. `Na^(+),Ca^(2+),Mg^(2+)`

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1 Answers

Isoelectronic species =Total no of electrons are same

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