Assuming the heterocyclic ring above to be planar: give the number of electrons that are contributed to the pi system of the heterocyclic ring by: atom 1; atom 2 ; atom 3 . enter na for atom 3 if the structure above has only two numbered atoms. how many electrons are in the pi system of the heterocyclic ring? (in the case of fused rings add all the pi electrons.) is the heterocyclic ring with the numbered atoms aromatic? submit answer