PF3 Molecular Structure and Properties

The video tutorial explains the molecular geometry of PF3 by examining its Lewis structure and applying the Valence Shell Electron Pair Repulsion (VSEPR) theory. It highlights the presence of three fluorine atoms and a lone pair of electrons around the central phosphorus atom, which leads to a trigonal pyramidal shape. The AXE notation is used to determine the molecular geometry, with PF3 classified as AX3E, indicating a trigonal pyramidal shape with bond angles slightly less than 109.5 degrees.

What is the central atom in the PF3 molecule?

• Fluorine

• Nitrogen

• Oxygen

• Phosphorus

How many fluorine atoms are bonded to the central phosphorus atom in PF3?

• Four

• One

• Three

• Two

What theory explains the shape of the PF3 molecule?

• Molecular Orbital Theory

• Valence Shell Electron Pair Repulsion Theory

• Hybridization Theory

• Crystal Field Theory

What is the role of the lone pair of electrons in the shape of PF3?

• It attracts the fluorine atoms closer.

• It forms additional bonds with fluorine.

• It has no effect on the shape.

• It repels the bonded atoms, affecting the shape.

In AXN notation, what does 'A' represent for PF3?

• The type of bonds

• The number of lone pairs

• The number of bonded atoms

• The central atom

How many non-bonding electron pairs are present in PF3?

• Zero

• Three

• One

• Two

What is the molecular geometry of PF3 according to AX3N notation?

• Trigonal Planar

• Tetrahedral

• Linear

• Trigonal Pyramidal

What is the approximate bond angle in a trigonal pyramidal structure like PF3?

• 90 degrees

• 109.5 degrees

• 120 degrees

• 180 degrees