Formal charge | Molecular and ionic compound structure and properties | AP Chemistry | Khan Academy

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The formal charge of an atom in a molecule is the charge that would reside on the atom if all of the bonding electrons were shared equally. We can calculate an atom's formal charge using the equation FC = VE - [LPE - ½(BE)], where VE = the number of valence electrons on the free atom, LPE = the number of lone pair electrons on the atom in the molecule, and BE = the number of bonding (shared) electrons around the atom in the molecule. View more lessons or practice this subject at www.khanacademy.org/science/a...
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[@monarchmain-6905]

You are one of the only mathematicians I understand on KZbin. You have truly helped me many times. You have my subscription

[@Dysonchips]

lier

[@rajwindermarwaha2240]

Million thanks for making science & maths easy for me and many others. Regards.

[@applejuiceman]

thank you so much for the help you give everyone, truly appreciate it!

[@tanzanite1l]

Mesmerizing classes with colorful lessons. Jazakallahu Khairan.

[@oshmi5398]

I always find it difficult to memorize this formula, thanks for making it so easy!

[@chemanywhere4659]

This is a good video explaining the concept of formal charges. Are there more such examples around?

[@Sahilkumar-se2ps]

Really great Tecnology just like education revolution these days Hatsoff 🙌

[@sciencenerd7639]

very helpful explanation

[@jayeshyedge7171]

Good Job!!!

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This is amazing.

[@kaamilahmed7052]

made it laughably easy as compared to the McGraw hill textbooks im paying hundreds of dollars for every semester. Thank you loads

[@dragonbrown1494]

Even though they have a different formal charge they're still the same chemical right? If we were to some this up to a complete mathematical equation they would both come out to zero. I guess the point I'm trying to make is what use do we get out of a set up like this?

[@applejuiceman]

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Saved me!

[@rajeshk4974]

Great

[@iftekharahmad2564]

Only I have to say that Biiiiig thanks

[@arjunachar6812]

In the first structure, how does the last oxygen have a formal charge of-1? Because it can’t have 7 electrons in the outer shell and the octet rule is not satisfied

[@optimus2008]

Actually, there are elements which are stable despite not obeying the octet rule. That's why the rule is discarded in higher classes, so we study about hybridisation.

[@amogh0901]

It does have 8 electrons in its valence shell (6 lone pair electrons + 1 single bond (2 electrons))so its octet rule is satisfied however it has only 7 of those electrons allocated to it due to the fact that you take 1/2 of bonded electrons so its 6 lone pair electrons + 1 electron from the single pair so its 7.

[@jinxedray]

Third.

[@tahaanouar2453]

Second

[@muxsin98]

can anyone help me in this problem ? A driver at 25 m / s detects an obstacle in his lane. Braking starts at a distance of 83 m. At a distance of 23 m, a speed of 13 m / s remains. The speed is expected to decrease steadily. a) What is the absolute value of the acceleration of the car? Give the answer with three significant digits.

[@oshmi5398]

You need to use the formula v^2-u^2=2as here, v is 13m/s and u is 25m/s. 'S' is the distance and 'a' is acceleration. Acceleration in this case will have a negative value (retardation) Wait, I just realised that this comment was posted 3yrs ago😅

[@margaretb8794]

First

[@waliuisa4554]

Thanks so much for this, it seems like magic to me in class 🥲. Bless up chef