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Periodic Table Ionization Energy Exceptions

1

Choose the best answer

Boron has a lower first ionization energy than beryllium because:

Verified Answer & Explanation⌄

Correct Answer: A) A 2p-electron is removed more easily than an electron from a filled 2s-subshell.

Concept Explanation

Boron loses a higher-energy 2p electron, whereas Be has a relatively stable filled 2s² subshell.

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