Resonance and Formal Charge - AP Chem Unit 2, Topic 6

In this video, Mr. Krug shows how some molecules have multiple resonance structures. He also shows students how to calculate the formal charge of each atom in a molecule and how to use formal charge to determine which Lewis diagram will represent the most stable structure for a molecule.

00:00 Resonance Structures
05:01 Formal Charge

[matthewn]

You do a great job in these videos explaining the concepts simply while going through several applications. Thank you!

[valeriacamilaleon]

Thank you, this is so much easier to understand than the college board ones :)

[이건섭-py]

I truly appreciate your effort in these videos !!

[maxpercer]

at 1:11 you have two regular covalent bonds and one coordinate covalent bond

[thewhat]

So does formal charge take priority over the octet rule? Thank you so much Mr. Krug, these videos are saving me!

[inico]

Wait so does college board allways accept if you don't put in into the Formal Charge version?

[zedzilla]

Is it correct to say all molecules have zero formal charge in their most likely state, regardless of so called octet rule?

Or is it more of a Least formal charge objective

In other words, should formal charge always equal zero or should it just be minimized

[Arielleeeee]

how can oxygen have 6 dots and a bond. doesnt it need 8 to be stable?

[SmhBigPG]

You are incorrect regarding the formal charge. The formula for formal charge is the number of valence electrons-nonbonding electrons-(bonding electrons/2). I hope you fixed it, because I referred to your method on my test, and failed, don't want others to do the same.