What is the shape of the ammonia $(NH_3)$ molecule?

The number of lone pairs of electrons present on $Xe$ in $XeF_4$ is

Which of the following molecules has no lone pair of electrons on the central atom?

What is the shape of $XeF_4$?

Bromine trifluoride autoionizes to form $BrF_2^+$ and $BrF_4^-$. The shapes of the cation and anion are respectively . . . . . . ,and . . . . . . .

The number of molecules having a lone pair of electrons on the central atom in the following is: $BF_3, SF_4, SiCl_4, XeF_4, NCl_3, XeF_6, PCl_5, HgCl_2, SnCl_2$