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NEETChemistryClassification of Elements and Periodicity in Properties

Why are ionization enthalpies always positive?

Options

  1. ABecause energy is required to add electrons to an atom.
  2. BBecause energy is always required to remove electrons from an atom.
  3. CBecause ionization enthalpies are measured in positive units.
  4. DBecause electrons repel each other within an atom.

Correct answer

B. Because energy is always required to remove electrons from an atom.

Step-by-step solution

Energy is always required to remove electrons from an atom, which is why ionization enthalpies are always positive.

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