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In my discussion, the TA drew ionic compounds with brackets like: [Na]+[Cl]- so from what I understand this would be the appropriate representation of the ionic bond. The example the TA used in discussion was [H]+[SO4]2-[H]+ where [SO4]2- had the Lewis structure for SO4 within the brackets (since it has covalent bonds).
I think that the lewis structure cannot be used to demostrate the ionic bond because the "-----" represents the sharing of electrons (it is the characteristic of the covalent bonding). However, we can still use the dots in lewis diagram to represents gaining or losing electrons for ions.
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