Periodic TableHard
Question
The correct sequence which shows decreasing order of the ionic radii of the elements is
Options
A.Al3+ > Mg2+ > Na+ > F- > O2-
B.Na+ > Mg2+ > Al3+ > O2- > F-
C.Na+ > F- > Mg2+ > O2- > Al3+
D.O2- > F- > Na+ > Mg2+ > Al3+
Solution
For isoelectronic species higher the 
ratio , smaller the ionic radius
for O2 = 
= 0.8
F- =
= 0.9
Na+ =
= 1.1
Mg2+ =
= 1.2
Al3+ =
= 1.3
ratio , smaller the ionic radius for O2 = = 0.8F- =
= 0.9Na+ =
= 1.1Mg2+ =
= 1.2Al3+ =
= 1.3Create a free account to view solution
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