Which ion has largest radius - Vidyadip

MCQ

Which ion has largest radius

✓
$Se^{2-}$
B
$F^-$
C
$O^{-2}$
D
$Rb^+$

✓

Answer

Correct option: A.

$Se^{2-}$

a
For species having same balance electron. Radii is inversely proportional to protons.

So, $r \propto \frac{e^{-}}{p}$

Hence, $r = se ^{2-}\,>\, Rb ^{+}$

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