8.2 How to Draw Lewis Dot Structures | Complete Guide | General Chemistry

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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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26 июл 2024

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Комментарии : 56

@FrontierThesisYU 6 месяцев назад

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 месяцев назад

Thank you so much for the kind words and I'm happy you found the channel :)

@mugenazkarayigit3890 6 месяцев назад

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 месяцев назад

You're welcome and Welcome to the channel!

@peybak 2 года назад

I appreciate your videos Chad. I might be in the minority but I think this is better than Netflix!

@ChadsPrep 2 года назад

Wow, Peyman - that's quite a compliment! Glad you enjoy them!

@andremejia888 2 года назад

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 года назад

Glad to hear it, Andre - much success to you!

@TheZmoliver 2 месяца назад

This is the best Lewis dot/formal charge video on the internet. Thank you, thank you!

@ChadsPrep 2 месяца назад

You're welcome and Thank You!

@angeloson2250 2 года назад

Thank you sir for the Free lesson 😊

@ChadsPrep 2 года назад

You're welcome!

@farzanehahmadi1550 Год назад

I wish i had found you sooner professor .. thank you so much you don’t even know how helpful you are!

@ChadsPrep Год назад

You're welcome and Thank You.

@the-cat-king 11 месяцев назад

YOU ARE LITERALLY THE BEST CHEMISTRY TEACHER!!!!!!

@ChadsPrep 11 месяцев назад

All in caps? I believe you!!! 😁😁😁 And thank you!

@parsabehnia1281 2 месяца назад

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 ...

@hacker_liao 3 месяца назад

bro u save my midterm thx

@hacker_liao 3 месяца назад

btw i love u

@ChadsPrep 3 месяца назад

Glad the channel is helping you!

@Omni-Kriss 2 года назад

Good stuff :) Also, love your varying t-shirts!

@ChadsPrep 2 года назад

Glad you like them and the videos!

@blakeoneil2959 2 месяца назад

Amazing explanation

@ChadsPrep 2 месяца назад

Thank you

@ConnorStear 8 месяцев назад

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 месяцев назад

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!

@user-cq9dd7wq4w 6 месяцев назад

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 RU-vid 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 месяцев назад

Glad to hear the videos are helping, while I don't have a video specifically on quantum mechanics, this might help: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-j3shIeqrV08.html

@user-cq9dd7wq4w 6 месяцев назад

@@ChadsPrep Thank you SOOO much, sir!

@ChadsPrep 6 месяцев назад

@@user-cq9dd7wq4w Happy Studying!

@mushroomravioli1406 Год назад

i wish i had found u sooner..ur gonna save my A levels this may

@ChadsPrep Год назад

Better late than never - all the best & Happy Studying!

@beyzaaydn2225 6 месяцев назад

hocam you are so good at this. thank you. best regards from metu

@ChadsPrep 6 месяцев назад

Excellent!

@loriskyrud1082 6 месяцев назад

yoour amazing . Thank you

@ChadsPrep 6 месяцев назад

You're welcome and Thank You.

@arushsarda2031 2 года назад

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 года назад

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.

@courtneyjohnson5529 10 месяцев назад

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!