Which of the followingelementshas themostnegativeelectrongainenthalpy ? Givereasons (i) [Ne] 3s^(2) 3p^(2)"" (ii) [Ne] 3s^(2) 3p^(4)"" (iii) [Ne] 3s^(2)3p^(5)

Which of the followingelementshas themostnegativeelectrongainenthalpy

1.	Which of the followingelementshas themostnegativeelectrongainenthalpy ? Givereasons (i) [Ne] 3s^(2) 3p^(2)"" (ii) [Ne] 3s^(2) 3p^(4)"" (iii) [Ne] 3s^(2)3p^(5)
Answer» Solution :The element(chlorine) correspodingto theelectronic cofiguration(III) will have thethe mostnegativeelectrongainenthalpy. Thisis due tothe REASONTHAT itcontainsoneelectrons lessthat thestablenoblegasconfigurationi.e.,[Ne] `3p^(2) 3p^(6)` and hencehas astrongtendency to acceptone electron to acquire thestablenoblegasconfiguration