The number of species below that have two lone pairs of electrons in their central atom is ___ (Round off to the Nearest integer) ${\mathrm{SF}}_4,{\mathrm{BF}}_4^{-},{\mathrm{ClF}}_3,{\mathrm{AsF}}_3,{\mathrm{PCl}}_5,{\mathrm{BrF}}_5,{\mathrm{XeF}}_4,{\mathrm{SF}}_6$

Two l.p. on central atom is $={\mathrm{ClF}}_3,{\mathrm{XeF}}_4$

The valence shell electron pair repulsion (VSEPR) theory is a model used to predict 3-D molecular geometry based on the number of valence shell electron bond pairs among the atoms in a molecule or ion. This model assumes that electron pairs will arrange themselves to minimize repulsion effects from one another.