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Which best explains why ionization energy tends to decrease from the top to the bottom of a group? The number of orbitals decreases. The number of neutrons decreases. Electrons get closer to the nucleus. Electrons get farther from the nucleus.

James Washington

in Chemistry

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Mindee Nelson on May 18, 2018

The answer could be that the Electrons get farther from the nucleus. As you go down a group, the Period is increasing, which means that each time a shell is added as the valence electrons are moving further away from the nucleus. Therefore, it is easier for valence electrons to be removed as well, why less energy is required to remove the electron, therefore a decrease in ionization energy.


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