The ions O^2- , F^- , Na^+, Mg^2+ and Al^3+ are isoelectronic.
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Answered by
16
The ions O2- , F- , Na+, Mg2+ and Al3+are isoelectronic. Their ionic radii show
(a) a significant increase from O2- to Al3+
(b) a significant decrease from O2- to Al3+
(c) an increase from O2- to F- and then decrease from Na+ to Al3+
(d) a decrease from O2- to F- and then increase from Na+ to Al3+
Solution:-
The correct option is : (b) a significant decrease from O2- to Al3+
Explanation:
Amongst isoelectronic ions, ionic radii of anions is more than that of cations. Further size of the anion increases with increase in -ve charge and size of cation decreases with increase in +ve charge. Hence, correct order is
O2- > F- > Na+ > Mg2+ > Al3+
(I think this will help you)
(a) a significant increase from O2- to Al3+
(b) a significant decrease from O2- to Al3+
(c) an increase from O2- to F- and then decrease from Na+ to Al3+
(d) a decrease from O2- to F- and then increase from Na+ to Al3+
Solution:-
The correct option is : (b) a significant decrease from O2- to Al3+
Explanation:
Amongst isoelectronic ions, ionic radii of anions is more than that of cations. Further size of the anion increases with increase in -ve charge and size of cation decreases with increase in +ve charge. Hence, correct order is
O2- > F- > Na+ > Mg2+ > Al3+
(I think this will help you)
Answered by
4
Answer:
(b) a significant decrease from O2- to Al3+
Explanation:
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