Chemistry - PERIODIC TABLE Question with Solution | TestHub

Second ionisation energy: Si < P < Cl is correct because second IE generally increases across the period due to increasing nuclear charge.

Electron affinity: Cl has higher EA than F due to less electron-electron repulsion in Cl, and Br has lower EA, so Cl > F > Br is correct.

Atomic size: Size increases down the group; Mg < Ca and Cl is smaller than Mg, so Cl < Mg < Ca is correct.

First ionisation energy: Zn > Cd > Hg is not correct because Hg has higher IE than Cd due to poor shielding and stable configuration.

Answer: (A), (B) and (C)