Lewis Dot

Lewis Dot 6: Resonance
If there are 2 or more equivalent ways to place a double
bond, this indicates resonance. show all possibilities and
writing a”ø” between them.
Example 1: What is the Lewis Dot structure of
the HCO 2 G ion?
Here is the structure using rules 1 - 6:
H–C
O
O:
H–C
O
O:
But why is the “=” to top and not bottom “O”?
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