BH3 Molecular Geometry and Properties

The video tutorial explains the molecular geometry of Boron trihydride (BH3), also known as Borane. It begins with the Lewis structure, highlighting that Boron is an exception to the octet rule, being stable with six valence electrons. The video then visualizes the trigonal planar geometry of BH3, where three hydrogen atoms are bonded to Boron, resulting in 120° bond angles. The tutorial further explores the geometry using steric number and AXE notation, confirming the trigonal planar shape. The video concludes with a summary of the molecular and electron geometry of BH3.

What is the common name for BH3?

• Boron tetrahydride

• Boron trihydride

• Boron pentahydride

• Boron hexahydride

How many valence electrons does Boron have in BH3?

• 4

• 8

• 6

• 2

What is the molecular geometry of BH3?

• Tetrahedral

• Trigonal planar

• Bent

• Linear

What is the bond angle between hydrogen atoms in BH3?

• 109.5°

• 90°

• 120°

• 180°

What is the steric number for BH3?

• 3

• 2

• 5

• 4

How many lone pairs are present in BH3?

• 0

• 2

• 3

• 1

What is the electron geometry of BH3?

• Tetrahedral

• Trigonal planar

• Bent

• Linear

In AXE notation, what does 'X' represent for BH3?

• Central atom

• Number of lone pairs

• Number of atoms bonded to the central atom

• Total number of atoms

What is the AXE notation for BH3?

• AX2

• AX3

• AX4

• AX5

What is the significance of the 'E' in AXE notation for BH3?

• It represents the central atom

• It represents the number of lone pairs

• It represents the number of bonded atoms

• It represents the total number of atoms