How many of the following order of SIZE are CORRECT ?
(I) $P^{3 -} < N^{3 -} > F^{-}$ (II) P $>$ N $>$ F (III) $Ar > Ne > He$
(IV) $Ca > Li > H$ (V) $Al > Ga > Be$ (VI) $Nb ≃ Ta$
(VII) $La > Y > Sc$ (VIII) $O^{2 -} > O^{-} < O^{+}$

Question

How many of the following order of SIZE are CORRECT ?

(I) $P^{3 -} < N^{3 -} > F^{-}$ (II) P $>$ N $>$ F (III) $Ar > Ne > He$

(IV) $Ca > Li > H$ (V) $Al > Ga > Be$ (VI) $Nb ≃ Ta$

(VII) $La > Y > Sc$ (VIII) $O^{2 -} > O^{-} < O^{+}$

TestHub · Accepted Answer

Cations < neutral < anions

Across period → size ↓

Down group → size ↑

d-block contraction reduces size of post-transition metals

Chemistry - PERIODIC TABLE Question with Solution | TestHub