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Chemistry Question on Classification of elements & periodicity in properties

In the P3,S2P ^{3}, S ^{2}. and Cl−Cl^- ions, the increasing order of size is

A

S2<Cl−<p3S ^{2 }< Cl^ {-}< p ^{3}

B

Cl−<S2<P3−Cl ^{-}< S ^{2}< P ^{3-}

C

S2−<P3−<Cl−S ^{2-}< P ^{3-}< Cl ^{-}

D

P3−<S2−<Cl−P ^{3-}< S ^{2-}< Cl ^{-}

Answer

Cl−<S2<P3−Cl ^{-}< S ^{2}< P ^{3-}

Explanation

Solution

In isoelectronic species, the size of ions decreases as nuclear charge or atomic weight increases. (Atomic weight of P=30,S=32P =30, S =32 and Cl=35Cl =35 ). Therefore Cl−<S2<P3Cl ^{-}< S ^{2}< P ^{3}