Based on the periodic trends for ionization energy, which element has the highest ionization energy?
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A.
Bromine
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B.
Fluorine
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C.
Helium
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D.
Nitrogen
Correct Answer:
C. Helium
Explanation:
Helium has the highest ionization energy among the elements listed. Ionization energy typically increases moving from left to right across a period and from bottom to top within a group on the periodic table. This trend occurs because atoms with smaller radii have a stronger electromagnetic pull on their electrons, making them more difficult to remove. As a noble gas located in the top-right corner of the periodic table, Helium possesses the smallest atomic radius and a stable electron configuration, resulting in the highest ionization energy of all known elements.
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