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Unformatted text preview: Use remaining electrons to satisfy the octets for each of the outside atoms. If you run out of electrons at this point, the skeleton structure was wrong. Go back to step I. 5. Place all remaining electrons on the central atom. If there are more than 8 electrons on the central atom, and the central atom is not third period or lower, you counted the number of valence electrons incorrectly. Go back to step 11. If the octet on the central atom is not complete, try sharing lone pairs of outside atoms to form double or triple bonds. Write one multiply bound structure for each outside atom with a lone pair to share; these are resonance structures. If you can't get an octet on the central atom, at this point, check to see whether the total number of valence electrons for this molecule is odd. It's impossible to give octets to all atoms in an odd electron molecules. Get as close to an octet as possible by forming multiple bonds....
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