Identify the correct order of the size of the following.

(a) Ca2+<K+<Ar<S2-<Cl-

(b) Ca2+<K+<Ar<Cl-<S2-

(c) Ar<Ca2+<K+<Cl-<S2-

(d) Ca2+<Ar<K+<Cl-<S2-

ANions are larger than cations in a period and more the negative charge, larger the ion is and vice versa for cations.

Difficulty Level:

• 13%
• 74%
• 8%
• 6%