Atomic Term Symbols

An introduction to atomic terms symbols, a bookkeeping method for many-electron wave functions.

[@andresyesidmorenovilla7888]

Mr, from the bottom of my heart and on behalf all confused physics students around the world, thank you.

[@ClawsByCaseyYouTube]

Man I wish you taught at my university....

[@abbyslavens]

I am so thankful for this! You explain this better than my prof, my textbook by Atkins, and all of the other online resources I have looked at.

[@ethangormong7506]

This was a truly exceptional lecture on an otherwise confusing and seemingly arbitrary topic. You have my gratitude!

[@MyGadgetBoy]

Excellent video, clear explanations, great pace. Thank you very much.

[@juliamullercraesmeyer2190]

This is THE BEST explanation I found about atomic term symbols. Thank you so much!

[@gaetanoleandropanariello5030]

If I had found this video in the morning, I wouldn't have wasted the entire day. Very clear explanation!

[@deanbitton5766]

I'm really looking forward to watch some more videos of your's. The concept of microstates was never too hard for me, but relating it to the actual quantum numbers (ML, MS etc) was almost impossible. Thank you for making it crystal clear. Lengthy and in depth video

[@alexbohane5959]

Thank you so much for this incredible video! This lecture is by far the clearest explanation I have seen on YT, my only wish would be that you posted more videos as these are so tremendously helpful!!

[@Leticia_Vetrano]

Oh my god, I am so grateful for this wonderful class! You are extremely didactic! I was using McQuarrie to study and I wasn't understanding anything! Thank you very much, Mr! This was really helpful!

[@Kaigosu]

Very clear and informative explanations, thank you!

[@dhanuddharagamage1313]

Great explanation. Thank you!!!!

[@awesomerahul19]

Great Explanation Sir, Could you please upload more videos on inorganic chemistry Please ?

[@brainburrito]

Thank you. My textbook was so hard to follow. Trying to read through this subject was like trying to drive through wet cement. This is so much better.

[@MicroageHD]

Textbooks are really horrible when it comes to this indeed.

[@aspie38]

Great! I wish he did more videos. His quantum chemistry explanations would be great!

[@MysteriousSlip]

Man, these are good! I wish you had the whole course uploaded!

[@theramkotiindravath]

What an explanation man! Mind blowing!!!!!

[@ANWITAROY]

Thank you professor. Indeed a very lucid explanation.

[@hritwikhaldar9272]

What a lecture!! Simply outstanding

[@lakshithalathpandura6264]

Well Logical Explanation... Great Job... Thank you very much Professor...

[@tia5558]

This was super helpful. Such a clear and easy to follow explanation. Thank you for this !

[@ozankarakaya100]

A very clear explanation, thank you so much!

[@rogerj9425]

This guy is a boss! Great explanation and detailed!

[@estherndungu490]

A fantastic video very clear. Thanx!

[@harshbaliyan146]

Simply awsome, thank you!

[@cathreenacathreena9872]

Dear Dr T. Danial thaaaaaaaaaaaanks from here to the moon and back. so so positive , energetic ...full of tender , extremely giving teacher. wishing u all all the best

[@rajeevk.pathak771]

Lucid. Subtle. Simplified. Palatable. Exciting. Enlightening !!!

[@dr.abdelmounaimchetoui]

great lecture helped me a lot. Thnak you so much Prof.

[@TheMinecraftSucht]

Really good explanation. You saved me! My exam is in 2 days and I was clueless how this works before I found this :)

[@iqratariq3098]

Thankyou Sir! I really appreciate your efforts and contributions toward real education

[@alexdb2976]

Ty so much Daniel

[@alifaraghat9727]

You deserve a Nobel prize for teaching me this subject

[@kishorephysics5928]

wow professor.............................Awesome.................................

[@rajatkamboj230]

Best lecture on this topic!

[@user-mf2sc8xu6v]

Thank You Thank You Thank You ....... Thank You So Much Sir..... It was amazing session..... Loved It.... 😍😇🙏 I wish everybody who need it will learn from here....

[@emilianoalanis3408]

Thank you very much Daniel. Great lecture

[@StrangeParticl]

Thank you so much for the great and simple explanation of such a subject

[@humeerabashir8025]

Marvellously explained....thanks

[@pranjalnobelmukherji1003]

Great explanation professor!!

[@reginatan9054]

thank you Sir! your explanations were really clear and good! thank you so so much! :)

[@thomasromano9298]

Thank you very much, I found your explanation very helpful and also interesting

[@rabiulchowdhury7904]

great lecture !! thank you so much sir.

[@sachinsalunke4973]

thank you sir , i expect more videos.really nice lecture

[@stephaniecardinalli5228]

this is a great video - thank you!

[@ishfaqwani9216]

U r true legend of chemistry sir

[@JS-rg7vo]

Thank god, my midterm will only covering single electron systems. Good luck to anyone doing multi electron term symbols

[@joelgeorge5237]

Highly recommended 👏

[@luisfernandomejiajiron1828]

Excellent!!!

[@hansrajsingh4010]

great explaination sir.

[@p.pchemistrybyprofessorpra9482]

Shandaar explanation sir

[@Rains96]

Super good!

[@shash2kx]

Fantastic!

[@zms9603]

So clear, thanks A LOT

[@fabiogorzonidoro766]

Amazing lecture!!!

[@kanwalmushtaq8282]

Good demonstration and easy explantion 👍

[@kunjalvara6113]

Thanks for the lacture. It is very helpful

[@deepanshu7763]

Thank you so much for this!

[@muraliac2005]

very clear explanation sir...thanking you

[@nicolabellucco5011]

very clear!!!!!!! Thank you so much

[@i_amitsharma]

🙏 thanks sir ! you've cleared my doubts... About the allowed and not allowed states.

[@ashismodak6481]

Thanks a lot Professor

[@petafoster5084]

Thank you, I did find this very useful :)

[@ritikthakur4921]

UNDERRATED CHANNEL!

[@edgarskletnieks5836]

Shalom! Marvelous !

[@aadarshrajsharma1856]

Thanks for your help. You are a life saver..😄

[@user-ha98]

شكرا لك يا استاذ

[@dexal409]

best video on the subject

[@toufiquejamal3095]

Yes sir,you hoped right I found it very useful.

[@samsoft4968]

sir, which text should I follow to get a in-depth view and physical interpretations of term symbols?

[@moonaliamjad3460]

really liked it.........

[@ihteshamghani5235]

sir can you be tell me that how to calculate the transition of samarium. which selection rule is used for this transition.

[@malyuki39]

you saved my life .. Thanks

[@anustupmukherjee5691]

Thank you so much Sir

[@georgekurian7408]

Awesome

[@mubarakayinla]

Thank you so much!!!!!!!!!!!!!!!!!!!!!!!!!

[@Jeonjongkook7]

شكراً لك

[@gloriamariacastanedavalenc6177]

thank you!!!

[@reemaborkar7741]

it was indeed helpful sir. But I think this is a long cut way. i have come across some Briet method for equivalent electrons. can u upload that video

[@mxame]

thank you sir

[@FinleyPetit]

Not all heroes wear capes

[@braket3521]

Hello sir, i have a question. Do complete subshells contribute to the atomic terms? Because when calculating the atomic terms for the n=2 Shell, we have to take into account both 2p and 2s since the n=2 shell is not filled, only the 2s subshell.

[@TDanielCrawford]

Again, sorry to be slow in responding to this, but I didn't see the comment. Completely filled shells have no spin or orbital angular momentum, and thus they contribute nothing to the atomic term symbol. If all shells are completely filled, the term is ^1S.

[@jaypatel1449]

does'nt the first three possiblities out of the 15 ways to arrange the 2 electrons in the subshells violating the hunds rule??

[@TDanielCrawford]

Hund's rules are used to estimate the energy ordering of the states *after* you've obtained the terms symbols representing them. Hund's rules don't determine the states themselves.

[@Shakiba.v_dt]

thank you so much you saved me

[@vishnusureshms4027]

thanku sir..

[@cesarcamacho8915]

thanks big dawg

[@IslamDueren]

why do you put your hand on your back 35:57

[@victoraguilera2267]

how would the terms of 3d10,3d2 y 4p2 ?? plis

[@cathreenacathreena9872]

what is the book title and version please??

[@Gio-ps4xi]

this video will save me, tomorrow I have the physical chemistry exam, I still don't understand one thing, when is it necessary to use Ms and Ml? for helium we didn't use them, while for carbon we did, why?

[@fiorellamazzini1401]

He teaches at our university. He's absolutely amazing!

[@ganiesuhailahmad9749]

He is going in a lucid way

[@Dolandtromm]

@@ganiesuhailahmad9749 you are from Kashmir

[@ganiesuhailahmad9749]

@@Dolandtromm Yes,Of course!!!!

[@user-ji5ju6wi3k]

ماشاء الله .اتمنى تحاضر بجامعتنا

[@warms.8354]

Heck yeah, if I pass my exam I'm gonna go ride a teacup!

[@user-db9ui8fo9x]

👍👍

[@JulienDrevon]

Thank you sir for your video ! I had a question. I tried to check p2 and p4 equality. When i compute the total spin with 4 electrons i have s1+s2+s3+s4,s1+s2+s3+s4-1,s1+s2+s3+s4-2,....,|s1-s2-s3-s4| ? But if this is true, we have 4 for the maximum value and |-1|=1 for the minimum value. Then we have S=4,3,2,1 ? By applying the Pauli principle we know that 4,3,2 is not possible in this case. We have then only the case where S=1. And for L = l1+l2+l3+l4, ...., |l1-l2-l3-l4| ==> L=4,3,2,1 ? I think i missed understand something in the way to compute L and S... Because i can't find in this example any possible S configuration. Can you help me sir please? Thx in advance

[@TDanielCrawford]

To couple spins (or any type of angular momentum) for several electrons, first couple the spins of just two electrons using the method described in the video, then couple in the next spin of the next electron to the resulting angular momentum from the first two, and then couple the next electron, and so on. For example, if you have two p-type electrons, then you first determine S_12 = s1 + s2, s1+s2-1, ..., and for all the resulting values of S_12, determine S_123 = S12 + s3, S_12+s3-1, ..., etc. I hope this helps!

[@JulienDrevon]

@@TDanielCrawford Yes i think i get it, thank you Sir :)

[@user-fq9ff9vf3u]

good

[@j1o2n3a4s5k6]

I dont get the reasonong for excluding some stuff and including others in the end ? What if we would have begun with the s states ? Seems arbitrary, or did I miss something ?

[@unknownanjel436]

Tq

[@mobinulhaq50]

Anyone can help me about term symbols of p3 configuration I wrote all 20 now I have no Idea how to write capital S

[@mobinulhaq50]

Molecular Sciences Software Institute Got it finally! Thank you so much...😊

[@prabhupadavibes3214]

Sir I think u forgot to tell us about the ground state term symbol

[@vishalbasu7376]

Sir can u upload videos of quantum chemistry too...please...

[@JS-rg7vo]

this is quantum chemistry. Spectroscopy is an applied field of QM