Effective Nuclear Charge and the Shielding Effect

[AKLECTURES]

Hey! The only atom in which shielding does not occur is hydrogen, and that is because it has one electron. Speaking in very basic terms, you are absolutely right. The two electrons are found in the 1s orbital. But lets examine the ionization energies of the two electrons in hydrogen. If shielding does not occur in helium, that would mean that both electrons should require the same amount of energy to remove them. In reality (through experiments), the ionization energy of the first electron is

[kaylynpark]

seriously one of the best explanations I have ever seen on youtube--thank you so much!

[AKLECTURES]

exactly!! most teachers force their students to memorize the trends because they either do not quite understand the effective nuclear charge themselves or cannot quite present it in a way that their students will understand it! I am glad to see that you understood the concept! Cheers

[Ashleethebeloved]

Your chemistry lesson was so good!!!! I did not understand Zeff and shielding at all, and you explained it so well. I am now confident with the information. Thank you. 

[adrenna]

EXCELLENT video. You did a great job at explaining this concept. The Zeff explains all of the periodic trends that teachers teach students to memorize. This background information really allowed me to really understand the trends, not just memorize them. Thanks!!!

[marklandau]

dang, this a great explanation. gonna watch this a few times! my professor is really good, but the class is kinda short so he doesn't have time to spend explaining things as well as you do. thank you Professor AK!

[AKLECTURES]

electron (the one further away) is only 1.34 while the effective nuclear charge on the first electron (after removing the second one) is 2. And this is once again, due to the fact that the first electron partly shields the second one from the full charge.

[neelpatel]

a very precise explanation which can be understood by anyone thank you looking forward to more such videos

[AKLECTURES]

lol thank you for your clarification. fortunately, it was not wrong but merely a simplification that I and many others before me have made for the purpose of explaining effective nuclear charge.

[madhukantvashishtha]

sir i'm really very pleased to see your chemisry channal on you tube....
thanks AK sir

[sumaia]

finally I understood the idea of effective nuclear charge, , thanks sir

[tarunnallur]

honestly this was great. Thanks a lot. I also copied down the notes you had on the whiteboard . Some really good stuff . The greatest way to teach is to always put things in a simple way because than it shows real understanding and you have doen that.

[darrenwhitaker]

excellent explanation! I think I'm finally beginning to understand this subject. Many, many thanks

[AKLECTURES]

24.6 electron volts and the ionization energy of the second electron is 54.4 eV. Why is this the case? Why does it require more than twice as much energy to remove the second electron than the first? The fact that the second electron is less tightly bound can be interpreted as a shielding effect!! This means that the other electron shields the second electron from the full charge of the proton nucleus. Once again, through experiments, we know that the effective nuclear charge on the second

[AKLECTURES]

Thanks for watching! Im glad it helped :)

[AKLECTURES]

Hey! That is wonderful to hear. You are most welcome :)

[Mathias]

Thank You, sir. You are an absolute Legend.

[AKLECTURES]

Thank you. Thats exactly what I was trying to do, glad to hear it worked :)

[oshos]

Thank You am glad to find ur channel on last....thank you sir

[ceny]

wow. very clearly explained! thanks! i hope you do more tutorials like this!!!