8.2 How to Draw Lewis Dot Structures | Complete Guide | General Chemistry
Chad explains and demonstrates exactly how to draw Lewis Dot Structures in this lesson including numerous examples. The octet rule is introduced and explained followed by the three notable exceptions including expanded octets. How to easily calculate formal charge is also included as well as how to draw multiple resonance structures for certain molecules. It is also shown for molecules exhibiting resonance how to use formal charge to distinguish between individual resonance structures. The Lewis Dot Structures for a large number of molecules are worked out for students including CCl4, NF3, HCN, CO2, N2O, SF4, XeF4, SO4^2-, and NO3^-.
I've embedded this playlist as a course on my website with all the lessons organized by chapter in a collapsible menu and much of the content from the study guide included on the page. Check this lesson out at www.chadsprep.com/chads-gener...
If you want all my study guides, quizzes, final exam reviews, and practice exams, check out my General Chemistry Master Course (free trial available) at www.chadsprep.com/genchem-you...
00:00 Lesson Introduction
01:10 Valence Electrons & Lewis Symbols for Elements
03:44 Octet Rule
08:43 Exceptions to the Octet Rule
15:35 CCl4 Lewis Structure
22:01 NF3 Lewis Structure
24:20 HCN Lewis Structure
27:11 CO2 Lewis Structure
34:24 N2O Lewis Structure (Formal Charge)
42:56 SF4 Lewis Structure
46:14 XeF4 Lewis Structure
49:02 SO4^2- Lewis Structure
55:51 NO3^- Lewis Structure (Resonance)
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I now understand Lewis Structures to the greatest extent I ever have. Thank you thank you thank you!!! So often, tutorials online leave students (like myself) questioning about other possibilities because they only show 1 or 2 or 3 (if you're lucky) of the 9 or so possibilities that you covered. Always worrying if there is some exception, or if there is some special type missing from the video is super nerve-wracking and anxiety-producing. My Gen Chem prof frequently put exceptions on the exams and everyone was stumped. So you are TRULY taking the stress out of learning science and I thank you from the bottom of my heart for being the best explainer of science on the internet I've ever seen.
@ChadsPrep
6 ай бұрын
Thank you so much for the kind words and I'm happy you found the channel :)
I appreciate your videos Chad. I might be in the minority but I think this is better than Netflix!
@ChadsPrep
2 жыл бұрын
Wow, Peyman - that's quite a compliment! Glad you enjoy them!
Hi Mr. Chad. I'm a student from Turkey and have been studying lewis structures from high school to first year of college, nearly 4 years and you are the one that taught me without memorizing but learning. Thank you so much!
@ChadsPrep
6 ай бұрын
You're welcome and Welcome to the channel!
Mr. Chad, I just want to thank you for making Chemistry more enjoyable and simpler. I owe it to you for saving my grade in my Chem course. Also, I like the t-shirts you've been wearing throughout your videos! You sir have truly been a blessing
@ChadsPrep
2 жыл бұрын
Glad to hear it, Andre - much success to you!
This is the best Lewis dot/formal charge video on the internet. Thank you, thank you!
@ChadsPrep
2 ай бұрын
You're welcome and Thank You!
I wish i had found you sooner professor .. thank you so much you don’t even know how helpful you are!
@ChadsPrep
Жыл бұрын
You're welcome and Thank You.
Thank you sir for the Free lesson 😊
@ChadsPrep
2 жыл бұрын
You're welcome!
bro u save my midterm thx
@hacker_liao
3 ай бұрын
btw i love u
@ChadsPrep
3 ай бұрын
Glad the channel is helping you!
perfect content! thank so much :) although i had one question ... the philosophical assumption behind calculating formal charge is that we actually neglect the electronegativity of atoms and assume that the electron is shared between them equally ... and then in the case of resonance structures we use electronegativity again to chose the more stable and more likely to happen structure ... it was a little bit confusing for me ...
Good stuff :) Also, love your varying t-shirts!
@ChadsPrep
2 жыл бұрын
Glad you like them and the videos!
YOU ARE LITERALLY THE BEST CHEMISTRY TEACHER!!!!!!
@ChadsPrep
11 ай бұрын
All in caps? I believe you!!! 😁😁😁 And thank you!
I have a quick question, my teacher does her lewis structures in squares. Like she'll have 4 elements connected to each other in a square. I've never seen this before? Thanks Chad for all you do!
Amazing explanation
@ChadsPrep
2 ай бұрын
Thank you
i wish i had found u sooner..ur gonna save my A levels this may
@ChadsPrep
Жыл бұрын
Better late than never - all the best & Happy Studying!
Chad, thank you so much for the amazing content! Love the efficient and clear presentation so so much! I did want to respectfully point out that when you have text in the dark box near the bottom, it can tend to conflict with the closed captions. I'm not sure if this is already something you've addressed by now (as this video is two years old). If you haven't though, that is a potential way you could even further improve your already invaluable contribution to students everywhere. Have a Happy Thanksgiving and thanks again for taking the stress out of science!
@ChadsPrep
8 ай бұрын
Hi Conor! I appreciate the feedback as my goal is to constantly be improving. Fortunately, this was pointed out to me a while back and every video since has had any wording placed on the screen placed at the top rather than the bottom. Happy Thanksgiving to you as well!
Hi Chad, thank you so much for your videos and lessons! I love your teaching so much that I even bought your master course and everything. I actually had a question about the second-to-last example in the video, the lewis structure for SO4^2-. Couldn't the "best" resonance structure for SO4^2- actually be achieved in 6 different ways, much like how the last example (NO3^-) could be achieved in 3 different ways? If this is the case, would you typically be expected to write this out? And how would you do the resonance hybrid structure for SO4^2-? Thanks again for everything!
@krishnamraju4254
2 жыл бұрын
I guess the same way like NO3^-. SO4^2- , with six Lewis structures; S in the center with 2+ charge, and delta negative charges on the surrounding four O-atoms with one solid line (single bond) and a dashed bond (giving a net 2- charge for the sulfate ion) for the resonance hybrid. Bond length also should be same for all four, less than S-O but higher than S=O.
hocam you are so good at this. thank you. best regards from metu
@ChadsPrep
6 ай бұрын
Excellent!
Thank you so much sir, I'm a student from Korea and I've been having much trouble with this lewis dot structure.. Many of the videos on KZread didn't deal with the possibilities such as NO3-, SO42-,,, etc and your video helped me understand the structure REALLY REALLY BETTER. I think I will be getting a lot more help in studying chemistry in the future. THANK YOU SO MUCH! P.S. Your pronunciation makes your lectures so much easier to understand (since I've never been to US or coutries that use English,, so I' ve never been able to hear pronunciations except standard English ... thus making it harder for me to watch various videos). Thank you! Oh! And by the way, if it is possible, could you please upload a video about quantum mechanics? (Not in a very detailed level, but in a level that can roughly help understand quantum mechanics.) I'm not criticizing the professors' lectures-they have profound knowledge and so on-but those lecutres were too difficult for me to understand... Again, thank you so much, and I hope you have a wonderful day : )
@ChadsPrep
6 ай бұрын
Glad to hear the videos are helping, while I don't have a video specifically on quantum mechanics, this might help: kzread.info/dash/bejne/nGenyqueodW8YJs.html
@user-cq9dd7wq4w
6 ай бұрын
@@ChadsPrep Thank you SOOO much, sir!
@ChadsPrep
5 ай бұрын
@@user-cq9dd7wq4w Happy Studying!
THANK YOU A 100000000000000000000 TIMES
@ChadsPrep
2 ай бұрын
You're welcome!
yoour amazing . Thank you
@ChadsPrep
6 ай бұрын
You're welcome and Thank You.
Lewis Dot Structures make me happy. Especially when they smile at me! ;-)
@ChadsPrep
2 жыл бұрын
Your comment makes me smile, Jordan!
Bless up king 🙏
@ChadsPrep
7 ай бұрын
Thanks!
ur amazing fr
@ChadsPrep
6 ай бұрын
Thank you
Organic chemistry: Lewis dot structure : kzread.info/dash/bejne/hZaGzdCPmpiogpM.htmlsi=-umJ42FH5FE0qqtk
58:00 I thought N can only make 3 bonds
@mehzabinmahasin715
Жыл бұрын
Double bond counts as one bond
the real giga chad
@ChadsPrep
6 ай бұрын
Happy Studying!
MS BENSON NNOOOOOOOO. Great video tho btw
@ChadsPrep
2 ай бұрын
Thanks!