$1.$ Bonding pairs $2.$ Non-bonding or lone pairs
The combination of these determine the shape of molecule.
- single bond have big impact on shape and double bond has less.
- The bond angle decreases as non-bonding pair increases
- In $H _2 O$, there are two lone pair of $e^{-}$. Hence bond angle will decrease.
(પરમાણ્વીય ક્રમાંક. : $B = 5,S = 16,Ni = 28,Xe = 54$)
$(A)\, OSF_2$ $OSCl_2$ $OSBr_2$
$(B)\, SbCl_3$ $SbBr_3$ $SbI_3$
$(C)\, PI_3$ $AsI_3$ $SbI_3$