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The minimum energy required to remove the valence electron from the outermost shell of gaseous atom to form the positive ion is called ionization potential or ionization energy. Which one of the following atoms will have highest ionization energy?

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The minimum energy required to remove the valence electron from the outermost shell of gaseous atom to form the positive ion is called ionization potential or ionization energy. Which one of the following atoms will have highest ionization energy? Answer: Fluorine

The atom with the highest ionization energy is Helium (He), as its electrons are held very tightly by its nucleus. Ionization energy is highest in elements with a small atomic radius and a high nuclear charge, like the noble gases in the top right of the periodic table.

Question context

This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the ETEA Educational Testing and Evaluation Agency preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.