Lewis Structures and Formal Charges

The video tutorial explains the structure of nitrogen dioxide, focusing on determining the total number of electrons and placing them correctly between atoms to form bonds. It covers the confirmation of electron configurations and finalizes the Lewis structure. The tutorial also includes calculating the charges on each atom and concludes with instructions for students to take notes.

What is the primary focus of the video tutorial?

• The chemical properties of oxygen

• The molecular geometry of carbon dioxide

• The structure of water

• The Lewis structure of nitrogen dioxide

How many total valence electrons are present in nitrogen dioxide?

• 21

• 19

• 17

• 15

What is the initial step in placing electrons between the atoms in nitrogen dioxide?

• Placing a single bond between nitrogen and each oxygen

• Placing a double bond between nitrogen and one oxygen

• Placing two dots between each atom

• Placing a triple bond between nitrogen and one oxygen

What adjustment is made to the electron pairs to form the final structure?

• Forming a triple bond between nitrogen and oxygen

• Transferring a pair of electrons to form a double bond

• Adding more electrons to nitrogen

• Removing electrons from oxygen

How many lone pairs of electrons does the oxygen with a double bond have?

• One lone pair

• Two lone pairs

• Three lone pairs

• No lone pairs

What is the formal charge on the nitrogen atom in the final structure?

• +1

• 0

• -1

• -2

Which formula is used to determine the formal charge on an atom?

• Bonds minus valence electrons plus dots

• Dots minus bonds plus valence electrons

• Valence electrons plus bonds minus dots

• Valence electrons minus bonds plus dots

What is the formal charge on the oxygen atom with a single bond?

• +1

• -2

• 0

• -1

What is the formal charge on the oxygen atom with a double bond?

• -1

• -2

• 0

• +1

What is the conclusion about the Lewis structure of nitrogen dioxide?

• It requires additional bonds

• It has an incorrect number of electrons

• It is the best representation of the molecule

• It is not a stable structure