Question #b71e0

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mrpauller.weebly.com
Oct 20, 2017

3

Explanation:

The electron configuration of boron is #1s^2 2s^2 2s^1#

Valence electrons are the ones in the highest energy levels. For boron this would be the 2 electrons in the 2s sublevel and the 1 electron in the 2p sublevel.

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Hope this helps!

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