Question

In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is :

(1) Electronegativity

(2) Electron gain enthalpy

(3) Ionization enthalpy

(4) Atomic radius

Comments

Classification of elements and periodicity in properties

Answer 1

Ans. (4) Atomic radius

Sol. On moving Left to Right along a period.

Atomic Radius$\implies$decreases.

Electronegativity$\implies$Increases.

Electron gainenthalpy$\implies$Increases.

Ionisation Enthalpy$\implies$Increases.