How many lose pair of electrons are present on the central atom of `CH_(4), H_(2)O, NH_(3), PCl_(3)` and `PCl_(5)` molecules?

How many electrons are present in the valence shell of P in PCl_3 ?

The number of lone pairs of electrons on central atom of H_(2)O,SnCl_(2),PCl_(3)and XeF_(2) respectively are:

How many electrons are present in the valence shells of the central atoms in the molecules of BeCl_(2), BF_(3) and PCl_(5) ?

How many of the following have sp^(3) hydridisation around the central atom ? (a) H_(2)O , (b) CH_(3) , (c) BCl_(3) , (d) BF_(4)^(-) , (e) BeCl_(2)(g) (f) PCl_(4)^(+) , (g) XeF_(2) , (h) CO_(2) , (i) NH_(4)^(+) , (j) PCl_(3)

How many molecules have two lone pairs on the central atom ? H_(2)O, SF_(4),I_(3)^(-),XeF_(5)^(-),XeOF_(4),PCl_(3),NCl_(3),ClF_(3),XeF_(2),NO_(2)^(-),CO_(3)^(2-)

Which among the following molecules have sp^(3)d hybridization with one lone pair of electrons on the central atom? (P) SF_(4) (Q) [PCl_(4)]^(+) (R) XeO_(2)F_(2) (S) ClOF_(3)

Find the number of molecules having two Ione pair of electrons on central atom. I_(3)^(+), XeF_(2),XeF_(4),H_(2)O,NH_(2)^(-),H_(2)S,H_(2)SO_(4),NF_(3)