Of the following elements, which has the largest first ionization energy?
A) Cl
B) Br
C) Na
D) Al
E) Se

Name: Of the following elements, which has the largest first ionization energy? A) Cl B) Br C) Na D) Al E) Se
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Question

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The first ionization energies generally increase as you move across a period from left to right. Among the given options, chlorine (Cl) is the closest to the right end of the period, thus having the largest first ionization energy.

Of the Following Elements, Which Has the Largest First Ionization