lewis structure homework help

[curry 1E]

"Draw the Lewis structure, including typical contributions to the resonance structure (where appropriate, allow for the possibil-ity of octet expansion, including double bonds in different posi-tions), for (a) periodate ion; (b) hydrogen phosphate ion; (c) chloric acid; (d) arsenate ion"
Can someone help me with this one?
And are we supposed to memorize each ion and what compound it makes?

[Victoria Li 1L]

I don't think we'll have to know nomenclature until later when we'll actually be taught it! I just looked up the chemical formula for each ion and then drew the structures. As for the problem itself, halogens can expand their octet, meaning they don't necessarily form only 4 bonds. If they have 7 valence electrons, they can form 5 bonds + 1 lone pair, or even more if they have an extra electron (since it's an ion). Hope that helps!

[Maddie]

So just to clarify, memorizing these specific ions is not something that we should place at the forefront when studying for this midterm?