Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Metallic character decreases and non-metallic character increases on moving from left to right in a period. Reason (R): It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period. In the light of the above statements, choose the most appropriate answer from the options given below:

Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Metallic character decreases and non-metallic character increases on moving from left to right in a period. Reason (R): It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period. In the light of the above statements, choose the most appropriate answer from the options given below: (A) (A) is false but (R) is true. (B) (A) is true but (R) is false (C) Both (A) and (R) are correct and (R) is the correct explanation of (A) (D) Both (A) and (R) are correct but (R) is not the correct explanation of (A)

Tardigrade Admin · Accepted Answer

From left to right in periodic table :- Metallic character decreases Non-metallic character increases ⇒ It is due to increase in ionization enthalpy and increase in electron gain enthalpy.