Bonding Models and Lewis Structures: Crash Course Chemistry #24

Рет қаралды 2,316,975

11 жыл бұрын

Models are great, except they're also usually inaccurate. In this episode of Crash Course Chemistry, Hank discusses why we need models in the world and how we can learn from them... even when they're almost completely wrong. Plus, Lewis Structures!
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: apple.co/3d4eyZo
Download it here for Android Devices: bit.ly/2SrDulJ
--
Table of Contents
Models 0:06
Linus Pauling & The Bonding Model 9:16
Lewis Dot Structures 4:27
Ionic Bonds 5:30
Covalent Bonds 6:10
Double Bonds 7:17
Triple Bonds 8:14
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Пікірлер: 1 000

@crashcourse 4 жыл бұрын

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: apple.co/3d4eyZo Download it here for Android Devices: bit.ly/2SrDulJ

@marinaglass 7 жыл бұрын

when you are crying watching this the day you have your chemistry test (':

@dnel7163 7 жыл бұрын

dude, so much relate i can't even. i actually feel like there's hope for my test now 😹

@okay_then8472 6 жыл бұрын

Lmao 😂😂😂

@bryonrusselmatias9362 6 жыл бұрын

The feels is strong within this one

@David-du3si 5 жыл бұрын

we're all so predictable

@Shockwave33333333333 4 жыл бұрын

Same I have mine in 6 hours 😭

@97GoldDust 9 жыл бұрын

You guys did something that school failed to do... I learned something.

@hopesnyder9032 9 жыл бұрын

Right there with you.

@ScienceBang 9 жыл бұрын

You won't get a highschool diploma from youtube.

@Phigma12 9 жыл бұрын

ScienceBang I got the IB with KZfaq...

@mattlyons9027 9 жыл бұрын

Phrzzy that's what I'm trying to do rn 😂

@jonathanchea463 9 жыл бұрын

ScienceBang its a good cram option for a chemistry test though

@77olivebranch 10 жыл бұрын

I learn more in a ten minute youtube video than I do in an hour and a half of chemistry class..

@Itsgdunk 10 жыл бұрын

freaking seriously

@noorrana3544 8 жыл бұрын

Please do a video on VSEPR theory

@judekh0 7 жыл бұрын

Noor Rana yes please

@alleyneary7507 7 жыл бұрын

Noor Rana Please I would love this!

@sushitrash1407 7 жыл бұрын

Noor Rana there is a guy named Tyler Dewitt who has a really helpful video on it

@ashleycloud1567 5 жыл бұрын

Yes please!

@mariyamamman3258 4 жыл бұрын

We actually do need it

@ruthrodriguez9567 8 жыл бұрын

I know you guys get this very often, but thank you so much. Chemistry doesn't come naturally to me, and you guys present the information in such a simple and straightforward way. I've always thought learning was fun, but you guys make me enjoy even the hardest subjects (to me). Thank you for doing this!

@rjarora5054 5 жыл бұрын

Hey i watched your channel playlist You have some good taste in sound😊

@rjarora5054 5 жыл бұрын

ruth rodriguez and with the playlist i agree with you on chemistry may mass times accleration be with you

@rjarora5054 5 жыл бұрын

And hey subscribed your channel see there your first suscriber😄😌😌

@rjarora5054 5 жыл бұрын

And last question : In which grade are u?

@TheSnipersOfAurora 9 жыл бұрын

I know half of you are here cause you guys have a final tom

@msokiedokie123 9 жыл бұрын

How?

@saimeghana2261 9 жыл бұрын

Case caro isn't it obvious! :P

@gabicsuha9319 9 жыл бұрын

Obvi...

@MrOmarabdulhadi 9 жыл бұрын

2 finals actually

@rana8778 9 жыл бұрын

yeah,who else searches for lewis structure on youtube...? *sighs*

@GenesisTheKitty 7 жыл бұрын

"model students"......*gasp* so he knows that all the people watching his videos are stressed highschool students who are cramming for their tests the night before the test?!

@wailrimouch4973 7 жыл бұрын

Not all of them I'm actually a high school student but I ain't stressed out about an exam and this stuff is not in the program I learn in School well most of it isn't at least. it's good to learn

@callumwigg1337 7 жыл бұрын

Luo Tianyi literally doing that RIGHT now

@pictureofjunkookwashingfac5516 7 жыл бұрын

wail rimouch waaa wht a neard 😩

@wailrimouch4973 7 жыл бұрын

sanjana zarin thank you

@xraykite1103 7 жыл бұрын

sanjana zarin wtf what did you even learn at you're english class?

@kainatfatima8740 9 жыл бұрын

Can you please do a Video on Vthe VSEPR Theory and Molecular Geometry

@carson2758 8 жыл бұрын

+Kainat Fatima PLEASE DO!!!

@Global_Havoc18 8 жыл бұрын

+Kainat Fatima Yeah- I dont understand that stuff.... :(

@harshitakanal7411 8 жыл бұрын

please :)

@gabrielladiaz3808 7 жыл бұрын

Yes!

@KatherinePierce_81 7 жыл бұрын

Kainat Fatima Watch khan academy videos in learning that area

@ugodeclanuzor5821 7 жыл бұрын

i love the way they also include the history of chemistry. it gives viewers a chance to go deep into the world of chemistry. by sparking curiosity. Very well done. inspiring

@anaenriquez668 9 жыл бұрын

I agree with many people here. I've read chapters, studied slides from lecture, and completed the practice sheets and I would still get caught up on this simple subject. You guys simplified it to my full understand in just 8 minutes. Amazing!

@MrElwoodBluez 9 жыл бұрын

"Doing whatever models do on saturday nights" AKA enough coke to kill a horse

@coquinne1957 5 жыл бұрын

KET

@blondstbrunett1 11 жыл бұрын

As a biochem major who's a little nervous about tutoring General Chemistry I next semester, I really appreciate this video (: great video layout, Hank -- thanks a lot!

@LadyJaja2010 10 жыл бұрын

Thank you for helping me try to pass my exam

@mariyamamman3258 4 жыл бұрын

Key word try

@scootchieandboo7475 6 жыл бұрын

THANK YOU! I was so lost, im not a chemist im a mom whos going back to school to get my bachelor's. I was scared I wasnt going to get it, and you really helped me so much... it finally makes sense

@blackberryhedge 9 жыл бұрын

When I get stuck with chemistry, I come here for a mental break and a different perspective on the topic at hand. Thanks for being so good at providing both!

@jennafowler2888 6 жыл бұрын

You guys are the only reason why I'm passing chemistry, so I thank you.

@TheEternalMoonlight 10 жыл бұрын

I looked at this video and saw "Hank" in the description. I was like, Hank? Like Hank Green? Naw... Then OMG! Hank! Automatic attention getter: being taught chemistry by one of my favorite youtube vloggers. Thank you!

@DrunkenHotei 9 жыл бұрын

"All models are wrong, but some are useful." -George E. Box

@slushii5492 7 жыл бұрын

*flails hands* YOU SAVED ME FROM FIRST EXAMS WEEK FOR IN PREPARATION FOR HSPT! *praise hand flails* FOR THAT I PRAISE THOU

@GenesisTheKitty 7 жыл бұрын

Imagine finding a fellow Len lover here under a chemistry video. XD

@slushii5492 7 жыл бұрын

_Oh whale den, I see you know me. 7v 7_

@GenesisTheKitty 7 жыл бұрын

*we will take over the world*

@meepmerp1562 8 жыл бұрын

8:48 Oh baby a triple!

@youvegot 8 жыл бұрын

GG m80

@jakehawes6387 9 жыл бұрын

It's hard to comprehend everything you are saying when you speak so fast. Not everybody is a natural with molecular geometry, chemical bonding and Lewis structures, so most of us who are learning appreciate when the information is slowed down. Thanks ^^

@Shi3i4lyf 9 жыл бұрын

Jake Hawes you can slow the video down from the bottom right side prompts.

@jakehawes6387 9 жыл бұрын

Congratulations. Not everybody is as fortunate as you with listening comprehension.

@aasthasharma3820 7 жыл бұрын

0:50 - the universe is weird get it? cause hank wrote a song about why the universe is weird? I don't even know why that cracks me up

@joshuamitchell5530 5 жыл бұрын

“There is no such thing as a quadruple covalent bond” *Transition metals would like to know ur location*

@its_momo_5995 4 жыл бұрын

there is also quintuple, and maybe hexuple

@c.j.6455 6 жыл бұрын

I'm learning this in 8th grade and my teacher literally taught it for 1 minute. Thanks, you're a better teacher than my science teacher.

@shanbut123 8 жыл бұрын

Thank you CrashCourse!! You guys are literally saving me in my online chemistry class. I really appreciate all that you do to create such amazing and straight-forward videos.

@cassidylouwerens7061 10 жыл бұрын

Thank you so much, Hank! These videos never let me down. I can totally count on CrashCourse when I need some Chem help. You explain things so clearly!

@megangray3271 7 жыл бұрын

YOU ARE AN ANGEL. I HAVE A COLLEGE CHEMISTRY TEST IN TWO DAYS AND THIS IS HOW IM STUDYING THANK YOUUUUUUUUUUUU

@lizanete18 10 жыл бұрын

I must say that u make chemistry look and easy. your videos are helping me a lot

@mstew7055 9 жыл бұрын

"It's important to realize that all models are imperfect to some extent"- that's deep

@marys.7713 7 жыл бұрын

CrashCourse is wonderful especially as a supplement to my irl chemistry class because it simplifies the information load without losing anything important or sacrificing the ease with which the viewer is able to understand it. Clears up so many things my teacher glosses over!! Thank you!

@natalyag.2872 10 жыл бұрын

This video is magnificent! I have learned more from you in 11:38 than I have from my teacher in the past two weeks. Thank you!

@ZenMasterT07 9 жыл бұрын

This is a must-have channel. Great job. Do you guys have a Physics crash course planned for the future by any chance? Does anyone know an equally comprehensive channel for Physics?

@johaneberry1532 6 жыл бұрын

Khan Academy. They’re brilliant

@Foodgamez 8 жыл бұрын

screaming right now.... less then 2 days before AP chemistry exams ;-; funny thing is in my AP chem class when drawing Lewis structures we use lines to represent bonds. but apparently we found out the AP exam says those lines are 'too advanced' and will receive ZERO credit if you have lines in the drawing of Lewis structures

@JohnSmith-gr8oo 8 жыл бұрын

+TuZeref Weird... I thought the lines represented the structure of it after all. Maybe they're cracked.

@cristiancarpio1814 6 жыл бұрын

4 years later and these are still helping people. Thank you so much

@stephpilcher 5 жыл бұрын

@winonabanana 10 жыл бұрын

literally cramming 3 hours before my finals exam

@trinityskye9879 10 жыл бұрын

me too!!!

@Whats_noah_up_to 7 жыл бұрын

"model students" (awkward sarcastic face) lol 10:50

@kaylauzlik7701 8 жыл бұрын

this is really helping me study. i have exams coming up and these videos are the only way to keep me interested, and i love the little random facts that I find so interesting that i haft to think about them more.

@abhayanand9585 Жыл бұрын

We often watch crash course videos because it's short to watch!

@saralinakhare1506 8 жыл бұрын

*1:45** I throw my models of atoms in the air sometimes saying aeeeeeh ooooohh gotta let goooo.*

@josephineleahy592 10 жыл бұрын

Hank Green, I cannot thank you enough for this video.

@shirinchatterjee303 6 жыл бұрын

Hank, and all of the crash course team, you guy are like legit, the best. I praise you for doing this for free on youtube.

@zombiesurfer1 10 жыл бұрын

These are easily the most helpful videos out there! Keep em coming and i'll never stop watching

@user-lk9pv7hd3g 5 жыл бұрын

I am in a desprate need to someone like him to be with me in every lecture in every subject.

@toastinggoodness 10 жыл бұрын

We are all model students? DOES THAT MEAN WE ARE NOT 100 percent accurate? :O

@scottpreston5074 7 жыл бұрын

Wow, what a wonderful lecture! I absorbed an amazing amount of information in a short time. If you can see it, you can understand and remember it very quickly.

@makennabayless8122 4 жыл бұрын

I have a test in two days and I'm an ADHD student seated in the back of my class and all i have to say is *chef kiss*

@Liamhvet 4 жыл бұрын

9:00 My PhD in Google tells me you're wrong

@rinzler2039 5 жыл бұрын

don't blink, you'll miss the whole video

@canadasprincesss 11 жыл бұрын

The comparison between fashion models and scientific models was really good and helped me view models (both types) in a different perspective

@mariagriffin1518 8 жыл бұрын

I don't know what I'd do without this. My Chemistry book told me to write Lewis Structures, and I didn't even know what they were.Thank you Hank.

@wisieharry7008 8 жыл бұрын

I still dont understand how do I know for sure when the atom form a single double or Triple covalent?

@allenjames1494 10 жыл бұрын

Thank you for the explanation. It was great. You need to get your eyeglasses adjusted. You repositioned them 7 times during the course of your discussion. May have been 8 actually.

@MatthiasPruim 9 жыл бұрын

missed a few classes! thank you very much, this has been really useful!

@wejdannn696 9 жыл бұрын

I'll be tested in this in a couple of days, you're a life saver. THANK YOU from all my heart

@ScienceBang 9 жыл бұрын

If you think that this show teaches you what school doesnt, you're wrong. All these topics should be covered in highschool. This is simply a briefing. Do not learn your highschool curriculum from this channel, please, learn it in highschool, however, this is still useful as study and review.

@InstantLightning 9 жыл бұрын

People are meaning that they learn better from this guy as he teaches better, but you're right on the studying part this guys perfect for studying

@baswdc2165 6 жыл бұрын

You're just jealous that he has more views on one video than you ever will on your whole website.

@baswdc2165 6 жыл бұрын

I still love your videos, though.

@ruhruh7961 7 жыл бұрын

Hey theres something that confuses me. Why is H2O bent instead of linear? Should the H have bonds and the 4 dots of electrons be on the top and bottom of oxygen?

@stevegerrish6720 7 жыл бұрын

When you have extra electrons surrounding the central atoms the un-bonded electron pairs repel the other atoms attached to the central atom (in this case the two hydrogen atoms). Because of this its electron shape and its molecular shape are different.

@ruhruh7961 7 жыл бұрын

Steve Gerrish Thank you, I appreciate you answering my question

@stevegerrish6720 7 жыл бұрын

s-media-cache-ak0.pinimg.com/564x/fc/3c/59/fc3c596e2c4306c838f5f27f015a7fa7.jpg check out this chart, the blue spheres represent electrons surrounding the central atom you can see how they take up space and therefore repel other bonded atoms surrounding the central atom.

@ruhruh7961 7 жыл бұрын

Thanks! This really helps my studies and makes it easier to understand

@yousefal-awadi1742 7 жыл бұрын

Calvin Malagon having 2 dots or electrons is called a lone pair While water H2O consists of 3 atoms it might be linear or bent The central atom is O and has two lone pairs one at the bottom and the other at the top The rule says if there is a lone pair(s) in the central atom when the compound consists of three atoms it will be bent CO2 is linear because the central atom carbon has no lone pair. I hope that u got the point mate :) U choose ):)

@jacobkozera8262 8 жыл бұрын

This show has saved my life too many times to count.

@shellblake5197 8 жыл бұрын

These videos are life saving Thank you please keep them coming!

@Spegrogy 4 жыл бұрын

When your teacher doesn't give a damn so you have to watch KZfaq

@patrickliscan3805 9 жыл бұрын

I love these vids

@deniferchichi7372 9 жыл бұрын

I HATE THESE VIDS

@TallHobbit 9 жыл бұрын

Deni Ferchichi WHAT'S YOUR PROB

@trissdavis 9 жыл бұрын

I love your enthusiasm, and sense of humor.

@matthewhutchinson7410 8 жыл бұрын

Thnx so much, ur videos always help me to understand complicated science stuff. Keep up the good work!!!

@duci586 10 жыл бұрын

I don't think laughing like this because of that last joke is healthy...

@notaturtle561 9 жыл бұрын

What?

@T-She-Go 9 жыл бұрын

If only you taught at my school

@ryandoyle7664 5 жыл бұрын

These videos are the best. I would love to say a MASSIVE thank you for your hard work and your amazing personality to simplify what some teachers just cannot do. Also does he in the best way possible remind any of you of a real life Sheldon Cooper?!

@JBDacasinJr 10 жыл бұрын

this was awesome. This is exactly what I needed.

@rileypurcell2159 10 жыл бұрын

Make a physics crashcourse

@calebsoliday927 7 жыл бұрын

This guy is replacing bill nye

@blu8993 7 жыл бұрын

Caleb Soliday That guy is called Hank Green

@freeyourselfmorowa9243 6 жыл бұрын

Hank could never ☹️

@vicvictv7781 6 жыл бұрын

Never

@yuvrajprakharsingh5082 7 жыл бұрын

dude you are really awesome at explaining chemistry, and the fact that you are funny is just a bonus.

@adventuretime1344 7 жыл бұрын

thanks SO much! im about to take my chemistry exam, and this REALLY helped! 👍☺

@loganperry6407 9 жыл бұрын

Chemistry is the best part of science!!

@NutmegTaco 10 жыл бұрын

Hank needs to stop wearing awesome shirts so I can keep my mind on chemistry instead of, "Where do I get that awesome shirt??"..

@Lauen324 10 жыл бұрын

You can probably get a lot of them on the dftba records website.

@kirigirikyouko4875 7 жыл бұрын

Thanks a lot, Hank. I have my chemistry test tomorrow xD. This is so helpful! ^^

@Inshanitythewriter 7 жыл бұрын

This is the first NOT-BORING Chemistry discussion I have ever seen in my entire life!

@tadasorentas1496 7 жыл бұрын

only 5 min in did he start actually talking about them wtf

@ICANTHEARHER2222 9 жыл бұрын

Aw, I wanted Brazilian models :(

@TheLostsheeep 11 жыл бұрын

So glad you make these videos as my chemistry teacher is a shocker! Oh hank you say the sweetest things ;)

@bidisha_roy 7 жыл бұрын

And thankyou to Crash Course for always having the answers!

@elijahmhawk 9 жыл бұрын

Where'd he get that shirt

@garrett53421 9 жыл бұрын

Elijah Hawk I am wondering the exact same thing!! I need one

@elijahmhawk 9 жыл бұрын

CrashCourse Tell Garrett Ruskauff and I where you got that shirt!

@FROPDESAI 9 жыл бұрын

Elijah Hawk dftba.com

@FROPDESAI 9 жыл бұрын

Garrett Ruskauff you can get it from dftba.com

@aeesyahmkas477 9 жыл бұрын

Wow . you talk sooo fast . I had to pause to understand some of it . 😅 Thanks for sharing !

@carolineh.1925 6 жыл бұрын

Thank you so much. I’m currently using this to study for my midterm.

@DaRealMidnight 11 жыл бұрын

These videos are sooo great. Thank you so much and please keep on doing them.

@naomisavv 7 жыл бұрын

Lol he talks really fast

@abualafia1 7 жыл бұрын

you should see John from Crash Course World History

@ttvurmom6185 4 жыл бұрын

Lower the playback speed, idiot.

@spacegames4685 8 жыл бұрын

Why don't quadruple bands exist? Why can;t there be a quadruple bond of carbon? C2

@madaboutit2306 7 жыл бұрын

cuz logic

@makeitmusical 7 жыл бұрын

A neutral C2 doesn't actually usually exist. Usually it comes as acetylide which is C2(2-)

@spacegames4685 7 жыл бұрын

But why

@makeitmusical 7 жыл бұрын

Electrons like to spread out when possible. Having a quadruple band would mean all of the density is at the center. Although achieving an octet is desirable, electrons also do repel, thus at that point your repelling force is greater than the force of bonding.

@spacegames4685 7 жыл бұрын

Thank you so much!

@reemar2168 7 жыл бұрын

Thank you guys so much! This helped me out a lot!

@theghettounicorn9862 6 жыл бұрын

Great videos - so useful. Thank you

@kaylaanderson2100 8 жыл бұрын

Can you be my teacher?

@721mehrad 9 жыл бұрын

great teaching . but you can you please talk little slower

@jennyrtgo 9 жыл бұрын

lol That's how fast they talk in crash course😂

@christopher5151 9 жыл бұрын

NOoo, i love the fast talk, thats how i learn bestestest, u can rewind, but if i speed em up, they sound like chipmunks : (

@tedderchemistry 9 жыл бұрын

If you want it slower click the little gear icon on the lower right of the video and change the playback speed! :-)

@FROPDESAI 9 жыл бұрын

Ray Tedder That makes Hank drunk. XD

@219mlc 9 жыл бұрын

Ray Tedder HAHHAHAHAH omg distractions.... I want to change playback speed on popular youtube vids now. That is more distracting with this video though :-) Glad for the info though.

@chelseageorgan3383 11 жыл бұрын

These videos are so awesome, I am definitely going to tell my little sister to use these next year when she takes AP Chemistry. I know they would have helped me. Hell, they would have helped me in my MIT introduction to Chemistry class. Too bad I took that before I found these. Thanks Hank!

@claudekennedy7855 8 жыл бұрын

Thank you so much for these videos! They are so helpful!

@tessampalmer6946 5 жыл бұрын

2019?

@iClone316 9 жыл бұрын

I'll be honest I don't feel like this fast talking zip through crash course if of any help at all. There's tons of other videos where they will explain it slowly and carefully, step by step. I can't keep up with this motormouth, he whizzes through topics as if he were explaining something that we already have a working knowledge of.