Question

17
.
Assertion: Ionisation enthalpy is inversely proportional to atomic radii.
Reason:
atomic radii depend on nuclear charge
HEALTH​

Answer 1

Answer: ionisation enthalpy is inverse proportion to atomic radii, this mean that the larger atomic radii the lower ionisation enthalpy and vise versa is true.

Explanation: this is because the smaller atomic radii has higher effective nuclear charges holding electrons strongly hence to remove this outermost electron become difficult hence it require the higher ionisation enthalpy.