AXE Notation and Molecular Geometry

The video tutorial explains the molecular geometry of CH3Br, also known as bromomethane. It begins with the Lewis structure, highlighting that the carbon atom has four bonds, leading to a tetrahedral geometry with bond angles of approximately 109.5 degrees. The video also demonstrates how to visualize this geometry and confirms the shape using AXE notation, showing that there are no lone pairs on the central carbon atom. The tutorial concludes by reinforcing the tetrahedral shape through different methods.

What is the common name for CH3Br?

• Bromomethane

• Methane

• Ethyl bromide

• Bromoethane

How many bonds are attached to the central carbon in CH3Br?

• Three

• Five

• Two

• Four

What is the bond angle in the tetrahedral geometry of CH3Br?

• 120 degrees

• 109.5 degrees

• 180 degrees

• 90 degrees

Which color represents the central carbon in the molecular visualization?

• Purple

• Green

• Blue

• Red

Why is the electron geometry of CH3Br the same as its molecular geometry?

• Due to the presence of a triple bond

• Because there are no lone pairs on the central carbon

• Due to the presence of double bonds

• Because of lone pairs on carbon

What does the 'A' represent in AXE notation for CH3Br?

• The number of lone pairs

• The central atom

• The number of bonds

• The type of bond

In AXE notation, what does the 'X' stand for in CH3Br?

• The number of atoms attached

• The central atom

• The number of lone pairs

• The type of bond

What is the AXE notation for CH3Br?

• AX5

• AX4

• AX3

• AX2

What molecular shape does AX4 correspond to?

• Bent

• Tetrahedral

• Linear

• Trigonal planar