Valence Electrons and Molecular Geometry

This video tutorial explains how to write the Lewis structure for SbBr5, also known as antimony pentabromide. It begins by counting the valence electrons of antimony and bromine, then constructs the Lewis structure by placing the least electronegative element, antimony, at the center. The tutorial covers the concept of expanded octets and completes the octets for bromine atoms. It then discusses the molecular geometry of SbBr5, which is trigonal bipyramidal, and explains the bond angles. The video concludes with the use of AXE notation to confirm the molecular geometry.

What is the total number of valence electrons in SbBr5?

• 40

• 35

• 30

• 45

Which element is placed at the center of the Lewis structure for SbBr5?

• Hydrogen

• Oxygen

• Antimony

• Bromine

How many valence electrons are used to form bonds in SbBr5?

• 10

• 20

• 40

• 30

What is the expanded octet in the context of SbBr5?

• An octet with less than 8 electrons

• An octet with more than 8 electrons

• An octet with 8 electrons

• An octet with exactly 8 electrons

What is the molecular geometry of SbBr5?

• Linear

• Trigonal Bipyramidal

• Trigonal Planar

• Tetrahedral

What are the bond angles at the equator in the molecular geometry of SbBr5?

• 60 degrees

• 180 degrees

• 120 degrees

• 90 degrees

How many lone pairs are present in the electron geometry of SbBr5?

• Three

• Two

• None

• One

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

• Number of lone pairs

• Central atom

• Number of bonds

• Peripheral atoms

In AXE notation, what does 'X' stand for?

• Central atom

• Lone pairs

• Bond angles

• Atoms bonded to the central atom

What is the AXE notation for SbBr5?

• AX3

• AX5

• AX6

• AX4