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Moderate

Ionization Energies, Electron Configurations, and Explanations

APCHEM-Q4GMG4
Ionization Energy (kJ/mol)
First 801
Second 2,430
Third 3,660
Fourth 25,000
Fifth 32,820

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The table above shows the first five ionization energies for a second-period element.

Which of the following identifies the element and provides the best explanation?

A

Boron because it has five electrons.

B

Boron because it has three valence electrons.

C

Nitrogen because it has five valence electrons.

D

Nitrogen because it has three electrons in a 2p sublevel.