Lone Pairs and Molecular Geometry of CO2

The video tutorial explains the number of lone pairs in carbon dioxide (CO2) by examining its Lewis structure. It highlights that carbon has no lone pairs as all its electrons are involved in chemical bonds, forming an octet. Oxygen, however, has two lone pairs and shares electrons with carbon. The molecular geometry of CO2 is linear due to the absence of lone pairs on carbon, which would otherwise alter the geometry. The video concludes with a recap of these concepts.

What is the primary focus of the video regarding CO2?

• The number of lone pairs on CO2

• The color of CO2

• The weight of CO2

• The taste of CO2

What is the formal charge on each element in the best Lewis structure of CO2?

• Variable

• Zero

• Negative

• Positive

How many lone pairs are present on the carbon atom in CO2?

• Three

• None

• Two

• One

What is the total number of electrons involved in chemical bonds around the carbon atom in CO2?

• Ten

• Eight

• Six

• Four

How many lone pairs are present on each oxygen atom in CO2?

• Four

• Three

• Two

• One

What is the molecular geometry of CO2?

• Bent

• Trigonal planar

• Linear

• Tetrahedral

How would the presence of a lone pair on carbon affect the molecular geometry of CO2?

• It would make it bent

• It would make it trigonal planar

• It would make it tetrahedral

• It would remain linear

What is the electron geometry of CO2?

• Tetrahedral

• Linear

• Bent

• Trigonal planar

In CO2, how many lone pairs are there in total on both oxygen atoms?

• Two

• Four

• Six

• Eight

What is the key takeaway regarding lone pairs on carbon in CO2?

• Carbon has two lone pairs

• Carbon has one lone pair

• Carbon has no lone pairs

• Carbon has three lone pairs