Question

Which of the following orders is/are correct?

• A. $O^2<F<N{a}^{+}<M{g}^{2+}$ increasing Zeffective.
• B. $M{g}^{2+}>N{a}^{+}>O^2>F$ increasing size
• C. $O^2<F<N{a}^{+}<M{g}^{2+}$ increasing ionisation energy
• D. $O^2<F<N{a}^{+}<M{g}^{2+}$ increasing electron affinity.

Answer 1

The correct option is A $O^2<F<N{a}^{+}<M{g}^{2+}$ increasing Zeffective.

Zeffective increases when number of protons in an atom or amount of charge increases$(+Ve$ charge$)$ and more contraction of size takes place$.$