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assigning formal charge
draw Lewis structure, determine each atom’s neutral valence, assign each atom ½ of bonding e- + lone pairs, calculate
formal charge calculation
FC = valence e- - lone pair e- - ½ (bonding e-)
better to have all FC =_ than any FC ≠ _
0
have arrangement with the smallest in magnitude ≠0 _
FCs
preferable when adjacent FCs are
zero or of opposite sign
preferable to have more negative FCs on
more electronegative atoms