Resonance Structures and Charge Stability

The video tutorial explains how to draw resonance structures and identify the major resonance contributor by comparing the stability of negative charges on different atoms. It discusses the role of electronegativity and atom size in stabilizing negative charges, using examples from the periodic table. The tutorial also covers drawing the resonance hybrid, emphasizing the distribution of negative charges among atoms.

What is the first step in drawing a resonance structure for a molecule with a negatively charged oxygen?

• Remove a lone pair from sulfur.

• Add a proton to the oxygen atom.

• Move a lone pair from oxygen to form a pi bond.

• Shift a pi bond to the carbon atom.

Which atom carries the negative charge in the second resonance structure?

• Nitrogen

• Sulfur

• Carbon

• Oxygen

Which structure is considered the least stable among the resonance structures?

• Structure A

• Structure B

• Structure C

• Structure D

Why is sulfur more stable in carrying a negative charge compared to oxygen?

• Sulfur has fewer lone pairs.

• Sulfur is more electronegative.

• Sulfur is smaller in size.

• Sulfur is larger and can disperse the charge better.

Which atom is the best at stabilizing a negative charge due to its size?

• Fluorine

• Chlorine

• Bromine

• Iodine

What is the major resonance contributor in the given structures?

• Structure A

• Structure B

• Structure D

• Structure C

In a resonance hybrid, how is the negative charge distributed?

• Only on the sulfur atom

• Dispersed among three atoms

• Equally among all atoms

• Concentrated on one atom

Which atom carries the majority of the negative charge in the resonance hybrid?

• Oxygen

• Carbon

• Sulfur

• Nitrogen

What is the significance of the size of an atom in stabilizing a negative charge?

• Larger atoms stabilize better.

• Size has no effect.

• Smaller atoms stabilize better.

• Only electronegativity matters.

What does the resonance hybrid resemble the most?

• The least stable structure

• The most stable structure

• None of the structures

• An average of all structures