Question

In the ionisation potential curve ___________ and ______________ elements occupy the top most and bottom most positions.

• A. group 1, group 17
• B. group 17, group 1
• C. group 2, group 18
• D. group 3, group 11

Answer 1

The correct option is B group 17, group 1

Across a period, Ionisation potential increases. Except noble gases. Ionisation Potential increases from group '1' to group 17. So in Ionisation Potential curve group 17 elements occupy top most and group 1 occupy bottom most position.