• # question_answer Why $N{{F}_{3}}$ is pyramidal but $B{{F}_{3}}$ is triangular planar?

In $N{{F}_{3}},\,N$ has the hybridisation $s{{p}^{3}}$ with one position occupied by lone pair of electrons but in $B{{F}_{3}},\,B$ has the hybridisation $s{{p}^{2}}$.