Lewis Dot Structures With Resonance

Which of the following molecules has resonance structures? $A) \text{CO}_{2} \ B) \text{H}_{2}\text{O} \ C) \text{O}_{3} \ D) \text{CH}_{4}$

In the resonance structure of $\text{NO}_{2}$, how many total valence electrons are there? A) 18 B) 16 C) 14 D) 12

Which ion has resonance structures? $A) \text{CO}_{3}^{2-} B) \text{CH}_{4} C) \text{NH}_{4}^{+} D) \text{H}_{2}\text{O}$

What is the formal charge on the nitrogen atom in \text{NO}_{3}^{-}? A) 0 B) +1 C) -1 D) -2

Which of the following represents a resonance hybrid? A) A single structure B) A combination of structures C) A molecule with no bonds D) A linear molecule

How many resonance structures can be drawn for \text{C}{6}\text{H}{6} (benzene)? A) 1 B) 2 C) 3 D) 6

In which of the following molecules is the formal charge minimized? A) \text{SO}{2} B) \text{H}{2}\text{O} C) \text{NH}{3} D) \text{C}{2}\text{H}_{4}

Which structure of \text{C}{2}\text{H}{4} has the least energy? A) Single bond B) Double bond C) Triple bond D) Quadruple bond

Which of the following is a characteristic of resonance? A) Fixed structure B) Variable bond lengths C) Single bond only D) Non-polar only