And thus begins the most revolutionary biology course in history. Come and learn about covalent, ionic, and hydrogen bonds. What about electron orbitals, the octet rule, and what does it all have to do with a mad man named Gilbert Lewis? It's all contained within.
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1. Re-watch the whole video = 00:00
2. Carbon is a Tramp = 01:51
3. Electron Shells = 04:23
4. The Octet Rule = 06:52
5. Gilbert Lewis = 05:09
6. Covalent Bonds = 04:41
7. Polar & Non-Polar Covalent Bonds = 07:58
8. Ionic Bonds = 08:29
9. Hydrogen Bonds = 10:11
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biology, crashcourse, gilbert lewis, carbon, hydrogen, electron, proton, covalent bonds, ion, octet rule, covalent bonds, polar, non-polar, ionic bond, hydrogen bond, hank green, john green, vlogbrothers, nobel Support CrashCourse on Subbable: http://subbable.com/crashcourse
“even the sexiest person you’ve met in your life is just a collection of organic compounds ramblin around in a sack of water” lol thanks hank i’m going through a breakup rn and that actually made me feel better😤👏🙌
Everyone thinks that he was more edgy back then, and possibly drank a little more... More in reality they just upload his videos at 1.25 now, which if you do to this video sounds the same as normal hank... haha
"Even the sexiest person you have ever met in your life is just a collection of organic compounds rambling around in a sack of water."
I don't know about you, but thinking about that statement gives me tremendously less anxiety when conversing with people I find attractive
Babes, this guy has made me understand what incompetent teachers in my school couldn't explain properly. why can't he come and work at my school, please!!! only for me because it that my friends won't listen anyway.
Video One: Carbon
Carbon has 6 neutrons, 6 protons and 6 electrons.
Octet Rule – atoms need 8 electrons in outermost shell to be stable.
Carbon needs 4 electrons to fill its outer shell – can therefore create four bonds.
Halogens are elements that only need one electron to fulfil their octet.
Alkali metals only have one electron in their octet.
Covalent bonding: atoms share electrons with each other to become stable.
Ionic bonding: atoms donate/accept electrons permanently to become stable – they become ions (i.e. positively or negatively charged atoms). Atoms prefer to remain neutral but will become an ion if it means satisfying their outer shells.
Polar charges are when there’s a positive and negative pole driven by the sharing of electrons.
Hydrogen bonding: a relatively weak bond between molecules (e.g. H2O molecules) due to the polar charges, where the positive and negative poles of each molecule are attracted to one another.
Lewis Dot Structures show how molecules are bonded together.
this is so fun! I have exam in biology in one week and I don't understand anything and think biology sucks, but I think you changed my mind :D Cant wait to watch all of them, but I wish English was my native language because the words and and some of the names are different in Norwegian.
I am a bit confused... In my VR Chem lab game/lesson... it shows a very different amount of electrons within each shell. Admittingly, it's a 3D model with alternate spherical and oblonged sphereical like 'shells', so it's a bit more complex (and acording to the program, the most accurate representation science can think up. Obviously nobody can get it 100% right since it's too small too see.)
But I just wanted to know how and why the two types of models are different, and if one or the other is more correct.
Yes that's Schrodinger's model which is the more correct one. Although still not perfect its the most accurate model we have since it's probably impossible to get a perfect model of an atom. The atom model used in the video is the Bohr model which isn't as accurate but it's much easier to remember and imagine, which is why it's more well known and taught.
I seriously wish you would not make jokes involving words like 'hussy', 'tramp' and 'sex' or use (and in this case OVER-use) the sexy/cute little drawings in vids that have little to do with it. I use some of your vids for my middle school classes, and although the word 'sex' is nothing 'bad' in itself, and indeed represents a fundamentally necessary operation when speaking of Biology, one must keep in mind the 'filters' that info passes through with students. By the time they get home, a vid with that word in it so frequently becomes a vid ABOUT it and problems may ensue. If you want to actually consider yourself a teacher, please keep that kind of thing in mind. If you are simply an individual knowledgeable abut a topic and are posting a vid about it, (e.g. a professional biologist or chemist) that's fine, and enjoyable to adults who understand the context of those words and the joking nature of their relation to the topic.But to "package" these as suitable for younger audiences without being 'clean' is asking for problems. Plus, although I know you will not change this, you speak FAR too quickly in your videos. I, and several other teachers I know of who use your vids, always slow the playback speed to 75%, It makes you sound slightly inebriated, but it makes your speech easier to understand. Cheers!
If you're wondering, this is how the most revolutionary course in biology of all time begins. Come and learn about covalent, ionic, and hydrogen bonds. What about electron orbitals, the octet rule, and what does it all have to do with a mad man named Gilbert Lewis? It's all contained within.
If you're wondering, this is how the most revolutionary course in biology begins the most revolutionary biology course in history. Come and learn about covalent, ionic, and hydrogen bonds. What about electron orbitals, the octet rule, and what does it all have to do with a mad man named Gilbert Lewis? It's all contained within.
I love this edgy look! I was so excited that her hair, even as short as it is now, was still able to be put into the fun and trendy dutch pigtail braids! Instead of braiding to the ends, I ended them in close together pigtails at the nape of her neck. After I finished braiding, I tugged on the outsides of the braid gently to loosen them and make them a little messy and fun! Since she doesn’t have enough hair to tie around the elastics, I made sure to use elastics that matched her hair so they blend in as much as possible. You could also cover them with clips or bows! A view from the back of her Dutch pigtail braids! A great braid for short hair is a micro accent braid! My biggest tip for braiding short hair would be to add in small slices of hair rather than big ones. I did a small (micro) braid along a slightly curved deep part for anther cute and edgy look! You could also do another one next to it if you wanted a little more to the look, but I really liked how simple this one was. You can see how the part curves a little better from this view of the back. I ended the braid close to the head with an elastic that matched her hair. For our fourth style, we did a 3/4 french braid! Super simple but also super cute! You could do any type braid! It would also look cute using a Dutch braid or a fishtail braid! I loved the side view of this braid! I will for sure be doing this one next time she goes to gymnastics or swimming, whichever comes first! Our last braid is two four dutch lace braids into two loops in the back. Start off by parting the hair down the middle. On each side of the part, do a dutch lace braid, adding hair in from only the section closest to the part as you braid. Tie the braids together in the back with a small elastic and before you pull the hair all the way through to make a ponytail, leave it in a cute little loop! If the hair is a little bit longer, you could do a tiny bun. Repeat this directly under the braid you just did so you have two rows and two loops.
We will have to be coming up with lots more short hair braids in the future, so be sure to give us a follow over at our newly redesigned blog Abella’s Braids to see more as we do them!
Thanks for reading! See you again this time next month!
love these ideas! My daughter recently cut about 8 inches off her hair and is loving her shorter hair, but I’ve mostly been at a loss of what to do with it! Thanks!
Abella has been begging me for at least a year, probably closer to two years, to cut her hair. I posted a photo on Instagram with a question in the caption. “Abella has been begging me to cut her hair short, do you think I should let her do it?” Almost everyone said “YES!” So thanks to all of the good advice from my followers, we did it…and we haven’t regretted it for a second! I think she looks so cute and it really fits her personality! It’s for sure a lot harder to come up with braids but it’s pushed me to step out of my comfort zone! We wanted to show you that even if you have short hair, there are lots of cute braids you can still do!
This first braid (above) is three ladder braids. Start out with a part deep to one side. On the side with less hair, start out by doing a waterfall braid along the part. Under that one, do another waterfall braid, but incorporate the waterfall pieces from the one above it as you braid. Under that one, do a french braid. Incorporate the waterfall pieces from the second braid as you go. We braided each one to the ends and used elastics that matched her hair to tie them off.