Q. Which of the following pairs show reverse properties on moving along a period from left to right and from top to down in a group?
A) Nuclear charge and electron affinity
B) Ionisation radius and electron affinity
C) Atomic radius and electron affinity
D) None of the above
Explanation
(c)
(a) Nuclear charge and electron affinity both increase in period and decrease in group.
(b) Ionisation energy and electron affinity both increase from left to right in a period and top to bottom in a group.
(c) Atomic radius decreases from left to right in a period and increases from top to bottom in a group whereas electron affinity increases from left to right in a period and decreases from top to bottom in a group.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.