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NEETChemistryClassification of Elements and Periodicity in Properties

How does the first ionization enthalpy change as you descend in a group in the periodic table?

Options

  1. AIt decreases.
  2. BIt remains constant.
  3. CIt increases.
  4. DIt fluctuates randomly.

Correct answer

A. It decreases.

Step-by-step solution

As you go down a group in the periodic table, the first ionization enthalpy decreases.

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