Question

Statement 1 : Ionisation energy decreases in a period.

Statement 2 : In a period Z dominates over screening effect

Options :

  1. Both statements 1 and 2 are correct

  2. Both statements 1 and 2 are incorrect

  3. Statement 1 is correct and statement 2 is incorrect

  4. Statement 1 is incorrect but statement 2 is correct

Show Answer

Answer :

Statement 1 is incorrect but statement 2 is correct

Solution :

Ionisation enthalpy increases in a period. Z dominates over screening effect (σ) in a period as Zeff. increases.

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