lewis stucture for cyanide with explanation ?? please 

Dear student

Cynaide ion, CN- has C and N as the atoms along with a negative charge.
So the valency of C is 4
The valency of N is 5
And because of the negative charge present, there is an additional electron.
Total electrons ,=4+5+1 =10
These electrons when arranged around C and N in such a way that the octet of both the atoms gets completed, gives the Lewis structure:


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