help with heisenberg and pauli (1 Viewer)

[pfft]

assess the contributions made by heisenberg and pauli to the development of atomic theory - 5 marks

can someone explain the contributions made by heisenberg with his uncertainty principle to the development of atomic theory? kk thx

 

[syriangabsta]

errmm...never seen this in syllabus..is it from an option topic?

 

[pfft]

oops this is from quanta to quarks

 

[independantz]

heisenburg-uncertainty principle the position and momentum of an electron cannot be precisely known..blah blah just expand on this, this theory was essentially the basis for quantom/atomic theory.
can't remember the other stuff

Pauli- neutrino, exclusion principle- electrons of the same atom cannot exist in the same quantum state, expand on this and the 4 numbers

and make a judgement

 

[obimoshman1234]

§ Heisenberg’s uncertainty principle;
o He said uncertainty is a part of quantum mechanics.
o Δx.Δp >= h/2п
o Δx is the uncertainty in location of an electron ß wave property.
o Δp is the uncertainty in momentum of an electron ß particle property.
o As you increase the accuracy of one the other’s decreases.
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§ Pauli’s – quantum numbers
o Three quantum numbers existed before Pauli’s time;
o Principle quantum number – n&shy; – principle energy state (principal orbits) as proposed by Bohr. *1, 2, …
o Angular momentum quantum number (orbital quantum number) – l –&shy; 0, 1, 2, …, (n-1). Is a subset of principle quantum number. Saying if n = 1 then l = 0 only. These can b seen as representing sub-shells. This explains the hyperfine lines as they are all different energy levels.
o Magnetic quantum number - m – due to magnetic fields of electrons. –l, …,-1, 0, 1, …, l. Is a subset of angular momentum quantum numbers.
o Pauli introduced the fourth quantum number; Spin quantum number – m<SUB>s</SUB> – {+-1/2}. Is due to spin of electrons, either clockwise or anti-clockwise. Explains how there can be 2 electrons in first shell, everything is the same for them except spin.
§ Pauli’s – exclusion principle
o No 2 electrons in an atom can have the same set of all quantum numbers.
o This allows us to determine exactly the maximum number of electrons that can be accommodated in one state.
§ Pauli –
o He also took the quantum mechanical model that was entirely theoretical and applied it to the hydrogen atom. He was able to derive Rhydberg’s constant and develop Balmer’s equation.
o This was the first time in the history of atomic physics where the theoretical preceded the observations.
§ All the quantum numbers tell us characteristics about an electron.


now just expand on that

 

[independantz]

o He also took the quantum mechanical model that was entirely theoretical and applied it to the hydrogen atom. He was able to derive Rhydberg’s constant and develop Balmer’s equation

Erm.. Wasn't that Bohr?