Introduction to Electron Spin Part 1

I provide a basic introduction to electron spin, and how to determine the spin quantum number S and its projection on the z-axis, Ms, for an atom or molecule in simple situations. I also introduce the spin multiplicity (2S+1), which is the value that the user has to input into quantum chemistry programs.

[@gopalakrishnanarumugam7576]

Excellent :)

[@ksrinivas1729]

Thanks

[@electronmechanicalcorporat2143]

Subscribed ☑️

[@tempedits9457]

Subscribed unsubscribed and then Subscribed again human.

[@markspott1741]

Thanks for the video. I'm very new at this, but I have question. Everyone seems to align their remarks with yours, but I've always thought it strange that 1 electron could cause the deflection of the atom considering ONE proton has 1836 times the mass of the ONE electron. That's like an elephant tail can cause an elephant to loose its balance if its tail moves. I know things are said to be weird at the quantum level but it still seems odd an electron can pull a mass 1836 times itself...not to mention the other 46 protons mass. Could it be the random arrangement of the protons/neutrons in the nucleus that influence the "magnetic" behavior as well? Or do you get the same behavior shooting just "electrons" without ANY "proton/neutron" components?

[@CheezeSlug]

Interesting question. The answer lies in the fact that electrostatic force between a proton and electron is around 2.4×10^39 higher than the gravitational force and therefore a lighter electron is able to "pull" an entire nucleus along with it in this experiment.

[@mushrafhussain8910]

Thank you for such as amazing lecture. Did you write a book on this topic? I would be extremely interested to read.

[@DavidSherrill1]

No book, sorry

[@mushrafhussain8910]

@@DavidSherrill1 Can you recommend some book for a detailed description (as you provide in your lecture) of singlet, triplet and doublet?

[@DavidSherrill1]

@@mushrafhussain8910 Szabo and Ostlund's Modern Quantum Chemistry has a good section on the very technical details of spin states and spin operators. Somewhat less technical, but still technical, is the introduction to spin in Donald McQuarrie's undergraduate p-chem textbook, Quantum Chemistry. For a somewhat more general and accessible introduction, I'm not sure of a good source.

[@user-sz5dt9ih7f]

How can physicists discount that an electron can spin around its own axis when, in fact, it has mass? How did they come to the conclusion that spinning is not something electrons do? No physicist has explained this point of view.