2.6 - Resonance and Formal Charge(AP)

What are resonance structures?

• Different molecules with the same formula

• Different possible Lewis structures for a chemical formula

• Identical structures with different atoms

• Structures with different molecular weights

What does a formal charge help determine in a molecule?

• The color of the molecule

• The stability of different resonance structures

• The melting point of the molecule

• The density of the molecule

What is the formal charge of carbon in the structure?

• +1

• 0

• -3

• -1

What is the formal charge of nitrogen in the structure?

• +1

• 0

• -1

• -2

In the structure, how many partially owned valence electrons does nitrogen have?

• 2

• 4

• 3

• 1

In the formula for formal charge, what do you subtract fully?

• Fully owned electrons

• Partially owned electrons

• Total electrons

• Shared electrons

What effect does a -3 formal charge on carbon have?

• Makes carbon more likely to react with external atoms/molecules

• Makes carbon less reactive

• Stabilizes the molecule

• Decreases the number of bonds

What does a lower electronegativity (EN) indicate about an atom's willingness to share electrons?

• Less willing to share electrons

• More willing to share electrons

• No effect on sharing electrons

• Prevents sharing electrons

What is the formal charge of hydrogen in HCN?

• +1

• -1

• 0

• +2

In the sulfate ion, which element is less electronegative and goes in the middle?

• Oxygen

• Sulfur

• Hydrogen

• Nitrogen