Electron Geometry and Molecular Shape of PF3

The video tutorial explains the electron geometry of PF3, focusing on the central phosphorus atom and its electron domains. It highlights the difference between electron and molecular geometry, using visual aids to show how lone pairs affect the structure. The tutorial concludes with a recap of the steric number and geometry types, emphasizing the tetrahedral electron geometry and trigonal pyramidal molecular geometry.

What must be considered when determining the electron geometry of PF3?

• Neither bonded atoms nor lone pairs

• Both bonded atoms and lone pairs

• Only the lone pairs

• Only the bonded atoms

What is the steric number for PF3?

• 2

• 5

• 3

• 4

How does the electron geometry of PF3 differ from its molecular geometry?

• Electron geometry is trigonal planar, molecular is tetrahedral

• Electron geometry is tetrahedral, molecular is trigonal pyramidal

• Electron geometry is linear, molecular is bent

• They are the same

In the 3D model of PF3, what shape do the fluorine atoms initially form?

• Tetrahedral

• Trigonal planar

• Square planar

• Linear

What effect does the lone pair have on the molecular geometry of PF3?

• It changes the geometry to square planar

• It pushes the fluorine atoms down, creating a trigonal pyramidal shape

• It has no effect

• It makes the geometry linear

What is the molecular geometry of PF3 when considering the lone pair?

• Tetrahedral

• Linear

• Trigonal planar

• Trigonal pyramidal

What is the steric number of PF3, and what does it indicate?

• 5, indicating a trigonal bipyramidal shape

• 4, indicating a tetrahedral electron geometry

• 6, indicating an octahedral shape

• 3, indicating a trigonal planar shape

What is the electron geometry of PF3?

• Trigonal bipyramidal

• Linear

• Trigonal planar

• Tetrahedral

What is the significance of the lone pair in determining the molecular geometry of PF3?

• It affects the molecular geometry by pushing bonded atoms

• It is considered only for electron geometry

• It is ignored completely

• It changes the electron geometry to linear