Class 11 NEET Chemistry Chemical Bonding And Molecular Structure Part 1

For neutral molecules,No. of electron pairs = No. of atoms bonded to it + 1/2[Gp.no of central atom-Valency of central atom]
∴ For CH4 no of e− pairs=4+

1

2

[4−4]=4(sp3)
For SF4 no of e− pairs =4+

1

2

[6−4]=5(sp3d)
For ions,
Nof electron pairs = NO of atoms bonded to it +1/2[G.P . no. of central atom - Valency of central atom ± No of electrons]
∴ For BF4−,no of e− pairs =4+

1

2

[3−4+1]=4(sp3) hybridisation
For NH4+,no of e− pairs =4+

1

2

[5−4−1]=4(sp3) hybridisation