Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The first ionisation enthalpy decreases across a period.
Reason R: The increasing nuclear charge outweighs the shielding across the period.
In the light of the above statements, choose the most appropriate from the options given below:
Select the correct option:
A
Both A and R are true and R is the correct explanation of A
B
A is true but R is false
C
A is false but R is true
D
Both A and R are true but R is NOT the correct explanation of A
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
First ionisation energy increases along the period.
Along the period Z increases which outweighs the shielding effect
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