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Monday, May 9, 2016

Bonding

Electron Dot Formulas
-includes bonded and unbonded electron pairs

1) Calculate the total number of valence electrons by adding all of the valence electrons for each atom in the molecule
2) Divide the total valence electrons by 2 to find the number of electron pairs in the molecule
3) Surround the central atom with 4 electron pairs
Use the remaining electron pairs to complete the octet around the other atoms. H is the only exception, which only needs 2 electrons
4) Electron pairs that are shared by atoms are called bonding electrons
Others used to complete octets are lone pairs
5) If there are not enough electron pairs to provide each atom with an octet, move a nonbonding electron pair between two atoms that already share an electron pair

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