Which of the following has the highest ionization energy?

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Team JKSSB Mock Tests · Accepted Answer

Ionization energy generally increases across a period due to increasing nuclear charge and decreasing atomic size. Among Na, Mg, Al, and Si (Period 3), Si has the highest effective nuclear charge and smallest size, thus requiring the maximum energy to remove the outermost electron from its gaseous state.

Which of the following has the highest ionization energy? MCQ with Answer and Explanation

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