The molecular geometry of the PF3 molecule is __________, and this molecule is __________.?

NetherCraft 0

A) trigonal pyramidal, nonpolar

B) trigonal planar, polar

C) trigonal pyramidal, polar

D) tetrahedral, unipolar

E) trigonal planar, nonpolar

1 Answer

  • PF3 has 4 electron domains with 3 bonding pairs and one non-bonding pair. It therefore cannot be a tetrahedral shape, nor a trigonal planar (only for 3 bonding domains with no lone pairs of electrons). So we duduce it has a molecular geometry of trigonal pyramidal.

    Now, the electronegativity of F is far higher than that of P which leads to the molecule being polar.

    Therefore, C) is true.

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