ASBr3 Molecular Geometry and AXE Notation

The video tutorial explains the molecular geometry of arsenic tribromide (ASBr3). It begins with the Lewis structure, identifying the central arsenic atom bonded to three bromine atoms and one lone pair of electrons. This results in a steric number of four, leading to a trigonal pyramidal geometry. The ideal bond angle is 109.5 degrees, but the presence of the lone pair reduces this angle due to increased repulsion. A 3D model illustrates how the lone pair affects the geometry. The AXE notation (AX3E) confirms the trigonal pyramidal shape. The video concludes with a summary of the molecular geometry of ASBr3.

What is the steric number of ASBr3 based on its Lewis structure?

• 4

• 6

• 3

• 5

What is the molecular geometry of ASBr3?

• Trigonal Pyramidal

• Trigonal Planar

• Linear

• Tetrahedral

How does the lone pair affect the bond angles in ASBr3?

• It increases the bond angles.

• It makes the bond angles exactly 109.5 degrees.

• It decreases the bond angles.

• It has no effect on the bond angles.

In the 3D model of ASBr3, how do the bromine atoms arrange themselves?

• They spread out as far as possible.

• They form a square.

• They cluster together.

• They form a straight line.

What is the expected bond angle in ASBr3 due to the lone pair?

• More than 109.5 degrees

• Exactly 120 degrees

• Less than 109.5 degrees

• Exactly 109.5 degrees

What does the 'A' represent in the AXE notation for ASBr3?

• The type of bonds

• The number of lone pairs

• The central atom

• The number of bonded atoms

In the AXE notation for ASBr3, what does 'X' stand for?

• The number of lone pairs

• The central atom

• The number of bonded atoms

• The type of bonds

How many lone pairs are present in ASBr3 according to its AXE notation?

• 3

• 2

• 1

• 0

What is the AXE notation for ASBr3?

• AX3E

• AX2E2

• AX4

• AX3

Which of the following best describes the molecular geometry of ASBr3?

• Linear

• Square Planar

• Bent

• Trigonal Pyramidal