Question

The ionic size decreases in the order

a) K+> S2-> Sc3+> V5+ > Mn7+.

b) S2-> K+> Sc3+> V5+ > Mn7+

c) Mn7+ > V5+ > Sc3+ > K+>S2-

d) Mn7+ > V5+ > Sc3+ >S2- > K+

Answer 1

Answer:

In such a series, size decreases as the nuclear charge (atomic number) of the ion increases. The atomic numbers of the ions are S (16), Cl (17), K (19), and Ca (20). Thus, the ions decrease in size in the order: S2- > Cl– > K+ > Ca2+.