Understanding the Lewis Structure and Resonance of NO2

This video tutorial explains how to draw the Lewis structure of nitrogen dioxide (NO2). It begins by counting the valence electrons, followed by calculating the electrons on the central nitrogen atom. The tutorial then constructs the NO2 structure, ensuring the correct number of bonds and lone pairs. It also covers the calculation of formal charges for nitrogen and oxygen atoms. Finally, the video demonstrates how to draw resonance structures for NO2, highlighting the movement of double bonds.

What is the total number of valence electrons in a nitrogen dioxide (NO2) molecule?

• 15

• 16

• 17

• 18

How many electrons are on the central nitrogen atom in NO2 after subtracting the highest multiple of 8?

• One electron

• Two electrons

• Three electrons

• Four electrons

Why is the NO2 molecule considered a radical?

• It has a complete octet.

• It has an even number of valence electrons.

• It has an odd number of valence electrons.

• It has no lone pairs.

What is the maximum number of electrons nitrogen can have in the NO2 Lewis structure?

• 9 electrons

• 7 electrons

• 6 electrons

• 8 electrons

How many lone pairs does the oxygen with one bond in NO2 need to complete its octet?

• Three lone pairs

• Two lone pairs

• Four lone pairs

• One lone pair

What is the formal charge on the nitrogen atom in the NO2 molecule?

• 0

• +1

• -1

• +2

What is the formal charge on the oxygen atom with two bonds in NO2?

• +1

• -2

• -1

• 0

What is the formal charge on the oxygen atom with one bond in NO2?

• -2

• -1

• 0

• +1

What happens to the double bond in the resonance structure of NO2?

• It moves to the other oxygen.

• It disappears.

• It stays in the same place.

• It forms a triple bond.

What remains unchanged in the resonance structures of NO2?

• The formal charge on nitrogen.

• The position of the double bond.

• The total number of valence electrons.

• The number of lone pairs on oxygen.