Number of lone pairs on bonded atoms is equal to ‘X’ .Number of lone $$pairs/central$$ atom is equal to ‘Y’ . $$X-Y$$ is equal to three in

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Infinity Learn · Accepted Answer

Number of electron $$pairs(EP)=V+M-C+A2$$; $$V=Group$$ number of central atom; $$M=-H$$, $$-X$$, $$-OH$$....monovalent groups attached to central atom ; $$C=Charge$$ of cation ; $$A=Charge$$ of anion ; $$V=5$$,$$6$$,$$7$$,$$8$$ respectively for $$15th$$, $$16th$$,  $$17th$$, $$18th$$ group elements ; Number bond pairs, $$BP(according$$ to VSEPR $$theory)=Number$$ of atoms directly attached to central atom;                                                                                             $$=5$$,$$4$$,$$3$$,$$2$$ respectively in $$PCl5$$, $$SF4$$, $$ClF3$$, $$XeF2$$ ; Number lone pairs on central $$atom(LP)=EP-BP$$ ;                                                                      $$=0$$,$$1$$,$$2$$,$$3$$ respectively in $$PCl5$$, $$SF4$$, $$ClF3$$, $$XeF2$$; $$PCl5-$$'$$5$$' bp $$+$$'$$0$$' lp ; $$sp3d-Trigonal$$ bipyramidal ; Total $$15$$ lone $$pairs/molecule$$ $$SF4-$$'$$4$$' bp $$+$$'$$1$$' lp ; $$sp3d-Distorted$$ tetrahedral (or) $$see-saw$$ (or) $$Z-shape$$ ; Total $$13$$ lone $$pairs/molecule$$ $$ClF3-$$'$$3$$' bp $$+$$'$$2$$' lp ; $$sp3d-Bent$$ $$T-shape$$ ; Total $$11$$ lone $$pairs/molecule$$ $$XeF2-$$'$$2$$' bp $$+$$'$$3$$' lp ; $$sp3d-Linear$$ ; Total $$9$$ lone $$pairs/molecule$$ Note; Each bonded halogen atom has '$$3$$' lone pairs on it ;

Number of lone pairs on bonded atoms is equal to ‘X’ .Number of lone pairs/central atom is equal to ‘Y’ . X-Y is equal to three in

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