Let's Review what we learned last week!

How does this all connect?

• Different electrons in an atom have different amounts of energy.

• Electrons closest to the nucleus have the least amount of energy.

• Electrons farthest from the nucleus have the greatest amount of energy.
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Electrons and Energy

Valence Electrons

is an outermost electron of an atom that participates in chemical bonding.

​Group 1 is one of the most reactive because it only has 1 valence electron.

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