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Electrons & Energy

Molecules - AP

Atoms are electrically neutral each electron(e-) is balanced by a proton (p+)
Energy Level The shell where electrons live; counted by how far from nucleus
Lowest energy level closest to nucleus
How many energy levels up to 8; depends on atomic number
OCTET RULE 1st shell holds 2 e- 2nd & 3rd shell can hold 8 e-
Valence Shell furthest from nucleus, at the surface
Most reactive level(shell) Valence Shell; high in electrons
What determines chemical properties of an atom The number of e- in the valance shell
Atoms with unfilled valence shells are unstable these atoms are reactive
Created by: barberalora11
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