Determine which of the following drawings would be the best structure for the N₂O molecule.

Which of the following phosphate, PO₄^3- Lewis structures is the best, most valid resonance structure?

Draw all the resonance structures for the following ionic compound:RbIO₂

Which of the following pairs represent resonance structures? (LO 7.13) (a)(b)(c)

The structure for the DNA base cytosine is shown.

Which of the following is not a resonance structure of cytosine? (LO 7.13) (a)

(b)

(c)

(d)

Use formal charge to select which resonance structure makes the largest contribution to the resonance hybrid. (LO 7.16) (a) Structure I (b) Structure II (c) Structure III (d) All structures are equivalent and make the same contri-bution to the resonance hybrid. (I)

(II)

(III)

Draw Lewis structures for the following: (f) NH₂OH