Formal Charge and Lone Pairs


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Gabriel Ordonez 2K
Posts: 113
Joined: Sat Jul 20, 2019 12:15 am

Formal Charge and Lone Pairs

Postby Gabriel Ordonez 2K » Sun Oct 27, 2019 5:51 pm

When we are calculating the formal charge of an atomic structure, I have a few questions in regards to counting. When we are counting for the number of bonded and lone electrons, do we count in pairs or in electrons individually? This will help me prevent silly mathematical errors. Thank you!

Jada Brown 2H
Posts: 100
Joined: Sat Aug 17, 2019 12:15 am

Re: Formal Charge and Lone Pairs

Postby Jada Brown 2H » Sun Oct 27, 2019 5:52 pm

It is the number of electrons in the bonds, not the number of pairs.

John Arambulo 1I
Posts: 58
Joined: Sat Jul 20, 2019 12:15 am

Re: Formal Charge and Lone Pairs

Postby John Arambulo 1I » Sun Oct 27, 2019 7:07 pm

You would count the number of electrons in the lone pair and bonds individually. But here's a shortcut to calculate the formal charge…
Formal charge=(#of valence electrons for the atom)-(Total number of lone pair electrons and bonds on the atom)

Sadhana_Dicussion_4A
Posts: 51
Joined: Sat Sep 07, 2019 12:19 am

Re: Formal Charge and Lone Pairs

Postby Sadhana_Dicussion_4A » Sun Oct 27, 2019 7:24 pm

You count the electrons individually and not in pairs when calculating formal charge. The formula for calculating formal charge is (number of valence electrons in the neutral atom) - 1/2(number of electrons in covalent bonds) - (number of electrons in lone pairs).

gabbymaraziti
Posts: 111
Joined: Wed Sep 18, 2019 12:19 am

Re: Formal Charge and Lone Pairs

Postby gabbymaraziti » Sun Oct 27, 2019 7:28 pm

You count the number of bonded electrons, not the number of pairs.


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