### TEST 3

Posted:

**Tue Nov 27, 2018 9:32 pm**Does anyone know if the equation for the FC will be provided on test 3?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=33&t=37672

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Posted: **Tue Nov 27, 2018 9:32 pm**

Does anyone know if the equation for the FC will be provided on test 3?

Posted: **Tue Nov 27, 2018 9:41 pm**

The only equations given are the ones on the sheet given on every test. The Formal charge equation is just FC = Valence - [Lone Pairs + (1/2 Bonding Pairs)]. It would behoove you to memorize it.

Posted: **Tue Nov 27, 2018 9:46 pm**

Mukil_Pari_4H wrote:The only equations given are the ones on the sheet given on every test. The Formal charge equation is just FC = Valence - [Lone Pairs + (1/2 Bonding Pairs)]. It would behoove you to memorize it.

I noticed that there was an extra equation given in test 2 compared to test 1 so I was wondering in case^^

Thank you though!

Posted: **Fri Nov 30, 2018 10:37 am**

I would not think so, though it's a relatively simple formula so they might expect you to memorise it.

Posted: **Fri Dec 07, 2018 3:30 pm**

You don't need the formula; count how many electrons are associated with an element and subtract the number of electrons from the number of valence electrons of that element.