Junior Chemistry: Periodic Table 2

[CrimitreeGaming]

Thank You and good Job

[quexalcoatl]

I know you get this all the time but your a very engaging teacher and I've found your videos really interesting even before I started taking chemistry.

The curriculum they use in year one college now doesn't build the same foundation that you made in your videos (stability and energy) -- they're more interested in the math\history, so your videos are a great supplement to it.

[Retard0800]

Great video except you got 2 things wrong, firstly you say the mass of an electron compared to a proton is about 1/10,000th whereas it's actually roughly 1/1836th (1/2000th to simplify) and secondly you say that the sodium atom with an atomic mass of 23 is the isoptope whereas it's the other sodium atom with an atomic mass of 22 that is the isotope.

[bannanaiscool]

@Retard0800 Um...ok...the magnitude of mass difference is between proton and electron is 10-27 to 10-31 kg...that's about a 10 000 difference, but when you consider the masses exactly, you have a point. But not with the isotope statement; both of the sodium atoms are isotopes OF EACH OTHER. One isn't the isotope and the other is not.

Chemguy

Chemguy

[ScreamingKengaroo]

great lesson! I watch these videos as substitution for studying textbooks since Textbooks are rather boring! HAHA BUT I DONT UNDERSTAND HOW THE DIAGRAM IS CRUDE HAHA!

[Bujar50]

i wish you were my teacher. She is a idiot. I actually learn from you and now i wont fail my midterm.

[Grobannela]

You're the best!!!...

Saludos desde Buenos Aires, Argentina. =)

[bannanaiscool]

In terms of mass, he's ten thousandth that of a proton!

Chemguy

[hbjon]

If the nucleus is the size of an ant in center field. How big is the electron sitting up in the seat?

[butterflyflower123]

Thank you so so much. Your videos have helped me so much. I can't thank you enough.

[Technognosia]

you are a really good teacher! you know how to explain stuff! thanx again ! greetings from greece my friend.

[mbs231]

Thank you!

[disneyaddict326]

dude

your a life saver you just helped me with my homework!!

[nycole69]

THANKS TEACH!

[natsu76]

i agree with aguselchacas. TEN thumbsup :)!!!

[edwordtv]

I find it amazing at how much I have seen the same thing over and over and still missed the minor but important details. I have never seen a chemistry lecture so concise and practical. REALLY great.

[kabarikallu]

great keepup the good work and energy

[sweetpromise4real]

thank u thank u thank uuuuu!!!!!!!!! I LOVE THE INTERNET---AND I WISH U WERE MY TECH CUZ UR AWSOME!

[Naminator99]

que

[aguselchacas]

You make me feel so interested in chemistry.

[jaeshim1]

Great video. makes it eash to understand. Thanks~

[onlybyHisgrace1]

Thank you so much for these videos. They are helping me to review in preparation for the classes I TA this semester. Thanks!!