JEE Main · 2026 · 24 Jan 2026 · Shift 1 · Classification of Elements and Periodicity

Metallic character decreases across a period and increases down a group, so among $\mathrm{K}$, $\mathrm{Mg}$, $\mathrm{Al}$ and $\mathrm{B}$ the order $\mathrm{K}>\mathrm{Mg}>\mathrm{Al}>\mathrm{B}$ is correct and Statement I is true. The atomic radius exceeds the ionic radius only for cations; an anion is larger than its parent atom, so the claim that the atomic radius is always greater than the ionic radius is false. Statement I is true but Statement II is false.