Question

The size of the following species increases in the order

• A. $Mg^{2 +} < Na^{+} < F^{-} < Al$
• B. $F^{-} < Al < Na^{+} > Mg^{2 +}$
• C. $Al < Mg < F^{-} < Na^{+}$
• D. $Na^{+} < Al < F^{-} < Mg^{2 +}$

Answer 1

Answer: (A)

$Mg^{2 +} < Na^{+} < F^{-} < Al$

Answer 2

$Mg^{2 +} < Na^{+} < F^{-} < Al$

$F^{-}$ has bigger size than $Mg^{2 +}$ and $Na^{+}$ due to small nuclear charge.