Question

Column-I contains some increasing orders of various species and column-II has the properties of the elements / ions. Accordingly match the column-I and column-II.

Answer 1

(A) All are isoelectronic species because all have same number of electrons i.e. 10, so the ionic size decreases with increasing nuclear charge.
(B) Order of hydration is $L{i}^{+}>N{a}^{+}>K^{+}>R{b}^{+}>C{s}^{+}$ and heavier hydrated ions move slowly. Number of atomic shells increases down the group, so ionic size increases.
(C) Correct order as Cl has less inter electronic repulsions than F due to bigger size of 3p-subshell.
(D) Oxidation state increases electronegativity increases. For isoelectronic species ionisation energy and electron affinity increases with increasing nuclear charge.