Molecular Geometry of CO2

The video tutorial explains the molecular geometry of carbon dioxide (CO2). It begins with the importance of a valid Lewis structure to determine the geometry. The tutorial then discusses counting the number of bonds and lone pairs around the central carbon atom, leading to the conclusion that CO2 has a linear geometry with a bond angle of 180°. A 3D visualization is provided to illustrate how the double-bonded oxygen atoms push each other away, resulting in a linear shape. The video also introduces the AXE notation, showing how it can be used to confirm the linear geometry of CO2.

What is the first step in determining the molecular geometry of CO2?

• Counting the number of atoms

• Drawing a valid Lewis structure

• Measuring bond angles

• Identifying lone pairs

In the Lewis structure of CO2, how many oxygen atoms are bonded to the central carbon atom?

• One

• Two

• Four

• Three

What is the steric number of the central carbon atom in CO2?

• Three

• Two

• One

• Four

What is the bond angle in the linear molecular geometry of CO2?

• 360 degrees

• 180 degrees

• 120 degrees

• 90 degrees

How do the double-bonded oxygen atoms in CO2 affect its shape?

• They form a square

• They attract each other

• They repel each other

• They form a triangle

What is the molecular geometry of CO2?

• Bent

• Trigonal planar

• Tetrahedral

• Linear

What does the 'X' represent in the AXE notation for molecular geometry?

• Total number of electrons

• Number of atoms bonded

• Number of lone pairs

• Central atom

In the AXE notation for CO2, what does the 'E' represent?

• Number of lone pairs

• Number of bonded atoms

• Central atom

• Total number of bonds

What is the AXE notation for CO2?

• AX4E2

• AX2

• AX2E1

• AX3

Which method can be used to determine the molecular geometry of CO2 besides the Lewis structure?

• Hybridization theory

• Molecular orbital theory

• AXE notation

• VSEPR theory