pauli's exclusion principle... (1 Viewer)

[lucky]

do we need to know it.. ??

and what does QUANTUM STATE mean ?

 

[inasero]

doesnt hurt to know id guess...

it says that no two electrons have same quantum characteristics (dunno what they are in depth)

as a consequence the maximum number of electrons in each orbital were able to be explained accurately

 

[+:: $i[Q]u3 ::+]

electrons have four quantum numbers that describe what state they're in - the principle number, the magnetic number.. ah crap i can't remember.. there's another one.

anyhoo. before pauli, there were 3. But then Pauli came along and introduced a fourth quantum number 's' which is associated with an electron's intrinsic 'spin'. (you have to realise the electrons aren't actually spinning like balls.. its just a way of describing it...=P)

The exclusion priniciple jus says that no two electrons can have all four quantum numbers in common. That is, if an electron occupies a quantum state described by the four numbers, then that state is 'occupied.'

This allowed pauli to yes, explain max number of electrons in each shell (making electron configuration fully intelligble) and also helped explain characteristic properties of elements including conductivity and magnetism.. i think... (?????)

remember u have to assess the contribution as well.(assess? evaluate? forgotten...). like.. well duh it was important cuz it allowed us to know electron configuration... >.<... a couple of years after, huge advances were made in quantum theory and the essential importance of the exclusion principle could be seen...so pauli has had a lasting impact.. and i think he got a nobel prize...

 

[freaking_out]

Originally posted by +:: $i[Q]u3 ::+
.....and i think he got a nobel prize...

yeah basically expand on that say something as: "it was a great contribution to the atomic theory and this was to such extent that he won the nobel prize" thats all u needed to know for the "assess" part.

 

[Constip8edSkunk]

i hate assess.... the exclusion principle explained bohr's predictions... applies to a range of particles, not just electrons, collectively called fermions... eh... is an integral part of quantum mechanics.... eh.... widely used today in both phys and chem... eh... nobel prize is also some what significant ..yes...

but with pauli, u can also talk about how he was the first 2 suggest the neutrino

edit: oh yeah... i cant remember if the magnetic and orbital quantum states were described by pauli or not, by they can b used to explain the various defficiencies of bohrs explaination of the emission spectra, eg, hyper fine splitting etc

 

[Skywalker]

Originally posted by inasero
it says that no two electrons have same quantum characteristics

When you say two electrons do you mean two electrons in the shell(s) of an atom?

 

[+:: $i[Q]u3 ::+]

yeah.. oops sorry if that was poxy wording.
just.. each and every electron in an atom will be in different quantum states.

btw magnetic and orbital (and principal) quantum states had already been suggested - pauli only introduced the s-number.

 

[lucky]

thanks guys.. !~~