AP EAMCET Engineering 2011 Solved Paper

Formal charge = Total number of valence electrons in the free atom - [ Total number of non-bonding (lone pair)electrons ] −

1

2

[ Total number of bonding (shared) electrons ]
on.....
the end N atom marked 1 .
=5−4−

1

2

(4)
=5−4−2=−1
the central N atom marked 2 ,
=5−0−

1

2

(8)
=5−4=+1
the end O atom,
=6−4−

1

2

(4)
=6−6=0