Valence Electrons and the Periodic Table

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Where do electrons live in atoms? They live in energy levels or shells, which are varying distances from the nucleus, and can hold varying numbers of electrons. The most important electrons in an atom are the valence electrons, which are in the outermost energy level or shell. We'll look at how to determine the number of valence electrons in an atom, based on which column it is in on the periodic table.

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Are people here like me? I have a test tomorrow.

[YesImStephanie]

I would do anything to make you my actual chem teacher at school.

[andescosmico]

I am an old teacher and I just learned from you how to improve my classes. Thanks.

[tdewitt]

two separate video cameras: one pointing at me, and one pointing down from above me. then i edit and combine the video using final cut pro.

[mattwolf]

I love way he talks and teaches everyhting. Keeps me interested in a boring topic

[janethuot]

The best instructor in the whole world! If I was an atom I’d bond with you. 😂

[imawsome]

This video moves so slow. Slow enough for me to understand!!!! People who catch on faster, may find themselves skipping forward a little bit, but it's nice to be able to follow along at a nice slow pace! 10/10!

[classiseverythingme]

You are very very good. You must write a TEXTBOOK....ASAP!!!

[greenlizardballs]

Chemistry is such a colorful subject and its too bad that its typically taught in such a technical manner.

This guy truly understands and appreciates the magic behind chemistry and it shows in the way he teaches. All science should be taught in this way. Feynman would be proud. 

Nothing but respect.

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to be honest everytime my teacher teaches im like lost (sometimes) but then i come here and im like OHHH. lol i wish you were my teacher. Keep doing what you do it's very helpful and much appreciated. Im watching your videos to study for a test 

[tdewitt]

Yes, it's just that I call it "unit conversion." So start by watching my video called "Converting Units with Conversion Factors."

[syrupgoose]

He sounds like he's blowing his own mind while explaining everything

[bryannae]

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[ImSomeRandom]

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[tdewitt]

Great question. Since Helium has a full shell with only 2 electrons, put the electrons next to each other on top of the symbol, like this: Hë.

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[Kaylynnlove]

"Already living in the nucleus." "one guy on the left." You're like the Bob Ross of chemistry.

[cbigskies]

Tyler,  
I want to thank you for your dedication to making science fun and understandable by telling stories that make the concepts understandable and interesting. I am a non-trad student in my early 40s and was that typical girl that was bad at math and science when I was younger. If I'd had teachers like you I know I could've gotten it then, because I do now because of your fantastic and fun videos. Again, thank you! 
Cheri 

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I'm a non-traditional pre-med student and this dude helped me through my accelerated Gen.chem class! (Entering medical school this coming fall!)