Phosphorus Triiodide

Number of valence electrons in phosphorus triiodide, PI₃?

Number of valence electron pairs in phosphorus triiodide, PI₃?

Number of lone pairs on phosphorus in phosphorus triiodide, PI₃?

What is the electron geometry in phosphorus triiodide?

• Linear

• Trigonal planar

• Tetrahedral

What is the molecular geometry in phosphorus triiodide, PI₃?

• Tetrahedral

• Trigonal pyramidal

• Bent

What is the normal bond angle in a tetrahedral structure?

(Just write the number not the degrees symbol)

What is the approximate bond angle in phosphorus triiodide based on the presence of a lone pair?

• 109.5^o

• Slightly less than 109.5^o (107-108)

• Significantly less than 109.5^o (104-107)

Does phosphorus triiodide have a net dipole?

• Yes

• No

Which intermolecular forces are present in phosphorus triiodide?

• Dispersion forces

• Permanent dipole-permanent dipole forces

• Hydrogen bonds

• Covalent bonds

Reorder the following, from smallest to largest boiling point. Assume electronegativities of phosphorus and hydrogen are equal.

• Phosphorus triiodide

• Phosphorus triibromide

• Phosphorus trichloride

• Phosphorus trihydride