Q. 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:

 6077  191 JEE MainJEE Main 2021Classification of Elements and Periodicity in Properties Report Error

Solution:

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.