Question

How to calculate bond pair and lone pairs

Answer 1

For eg take NH3 since nitrogen has 3 bonded hydrogen it has thus 3 bond pairs. nitrogen has 5 electrons out of which 3 are already shared so it has 1 pair of electrons left. That pair is the lone pair. U can also calculate hybridization of the central atom sp3 for NH3 SO H=4 the lone pair =H-(no of monovalent species)
4-3=1 lone pair in NH3

Answer 2

Answer:

Count the number of atoms bonded to the central atom and multiply by 8 to account for full octets on all atoms involved; 2 bonded I atoms account for 16 valence electrons. There are three lone pairs (6/2) of electrons around the central atom.

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