The molecular geometry of $\mathrm{PF}_3$ is ...... .
The molecular geometry of $\mathrm{PF}_3$ is ...... .
tetrahedral
pyramidal
trigonal planar
square planar
Solution
$\mathrm{PF}_3$ has four regions of electron density / electron clouds around the central $\mathrm{P}$ atom. The regions of electrons make a tetrahedral arrangement with a bond angle of 109.5 . Only three regions of electrons are bonding and one is non-bonding, so the overall shape is trigonal pyramidal. Thus, the correct option (2).