Molecular Geometry of SeF6

The video tutorial explains the molecular geometry of selenium hexafluoride (SeF6). It begins with the Lewis structure, showing selenium as the central atom with six bonds to fluorine atoms, allowing for an expanded octet. The steric number is calculated as six, leading to an octahedral molecular geometry with 90-degree bond angles. A 3D model is used to visualize the structure, and the AXE notation (AX6) confirms the octahedral shape. The tutorial concludes by reiterating the bond angles and molecular geometry.

What is the first step in determining the molecular geometry of SeF6?

• Drawing the Lewis structure

• Identifying the bond angles

• Using AXE notation

• Calculating the steric number

How many bonds does the central selenium atom have in SeF6?

• Four

• Seven

• Five

• Six

What is the steric number of SeF6?

• Seven

• Four

• Five

• Six

What molecular geometry does SeF6 exhibit?

• Trigonal bipyramidal

• Square planar

• Tetrahedral

• Octahedral

In the 3D model of SeF6, what is the central atom?

• Fluorine

• Selenium

• Oxygen

• Nitrogen

What is the bond angle in the octahedral geometry of SeF6?

• 120 degrees

• 90 degrees

• 60 degrees

• 180 degrees

What does the 'A' represent in AXE notation for SeF6?

• The central atom

• The number of lone pairs

• The number of bonds

• The type of bonds

How many lone pairs are present on the central atom in SeF6?

• Three

• Zero

• One

• Two

What does the 'X' represent in AXE notation for SeF6?

• The type of bonds

• The number of atoms bonded to the central atom

• The central atom

• The number of lone pairs

What is the AXE notation for SeF6?

• AX5

• AX4

• AX3

• AX6