Resonance and Formal Charges

Draw the best electron dot structure for PCl₃. How many pairs of non-bonded (lone pair) electrons are there on P?

• Zero

• One

• Two

• Three

Choose the electron dot diagram that correctly shows the bonding in methane CH_4.

• A

• B

• C

• D

Tags

NGSS.HS-PS1-2

What is the formal charge on oxygen for the hydronium ion H₃O⁺?

• +3

• +1

• -2

• -3

• 0

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Choose the electron dot diagram that correctly shows the bonding for the nitrite ion, NO₂^-:

• A

• B

• C

• D

• E

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Choose the electron dot diagram that correctly shows the bonding in H₂N₂:

• A

• B

• C

• D

• E

Tags

NGSS.HS-PS1-2

Draw the best electron dot structure for the sulfate ion SO₄^2- that follows the octet rule. What is the formal charge on sulfur in this structure?

• 0

• +1

• -1

• +2

• -2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Are A and B resonance structures of each other?

• Yes

• No

• Cannot be determined from the information given

Tags

NGSS.HS-PS1-2

Which electron dot structure is correct for the element chlorine (Cl₂)?

• A

• B

• D

• D

Tags

NGSS.HS-PS1-1

Which electron dot structure is correct for carbon dioxide CO₂?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many (total) reasonable resonance structures can be drawn for the carbonate ion (CO₃^2-)?

• 1

• 2

• 3

• 4

• None