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How to calculate formal charge...??

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How to calculate formal charge...??

Posted by Pranali Jadhav 3 years, 10 months ago

CBSE > Class 11 > Chemistry

2 answers

Divyansh Rai 3 years, 10 months ago

Formal charge= total no.of valence electrons-total no. of lone pair electron-1/2 total no.of bonding electron

Yogita Ingle 3 years, 10 months ago

The formal charge over an atom of a polyatomic molecule or ion is the difference between the valence electron of that atom in the elemental state and the number of electrons assigned to that atom in Lewis structure.

Mathematically, it can be expressed by following formula:

F.C. = [Total no. of valence e^– in free state] – [total no. of e^– assigned in Lewis structure] F.C. = [Total no. of valence e^– in free state] – [total no. of non-bonding pair e^– (lone pair)] – 1/2 [total no. of bonding e^–]

The factor of ½ is attached to the no. of bonding e^– because bonding e^– is shared between two atoms.

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