Lewis Structures and Valence Electrons

The video tutorial explains the Lewis structures for C3H4, highlighting three possible configurations. Each structure uses 16 valence electrons to fill the outer shells of the atoms. The first structure features two double bonds, the second uses a triple and a single bond, and the third forms a ring with two single bonds and one double bond. The tutorial emphasizes the importance of valence electrons and different bonding arrangements in achieving full outer shells for carbon and hydrogen atoms.

How many valence electrons are available for the C3H4 molecule?

• 18

• 12

• 16

• 14

In the first Lewis structure, how many double bonds are present?

• Two

• Three

• None

• One

What is the bonding arrangement in the second Lewis structure?

• Two double bonds

• One double bond and two single bonds

• One triple bond and one single bond

• Three single bonds

In the second Lewis structure, how many bonds does each carbon atom have?

• Four

• Three

• Two

• Five

What is the shape of the third Lewis structure?

• Tetrahedral

• Ring

• Bent

• Linear

How many single bonds are present in the third Lewis structure?

• Two

• Three

• One

• Four

In the third Lewis structure, how many valence electrons does each hydrogen atom have?

• Four

• Three

• Two

• One

Which of the following is true for all three Lewis structures of C3H4?

• Each carbon has six valence electrons

• Each hydrogen has a full outer shell

• There are 18 valence electrons used

• Each structure has a linear shape