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Topic: Pauli exclusion principle


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  Spartanburg SC | GoUpstate.com | Spartanburg Herald-Journal
The Pauli exclusion principle is one of the most important principles in physics, primarily because the three types of particles from which ordinary matter is made—electrons, protons, and neutrons—are all subject to it; consequently, all material particles exhibit space-occupying behavior.
The Pauli exclusion principle underpins many of the characteristic properties of matter from the large-scale stability of matter to the existence of the periodic table of the elements.
It was invented by Pauli in 1924 to explain experimental results in the Zeeman effect in atomic spectroscopy, ferromagnetism, and how the periodic table is regulated by the electron structure of atoms, well before the 1925 formulation of the modern theory of quantum mechanics by Werner Heisenberg and Erwin Schrödinger.
www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=Pauli_exclusion_principle   (1286 words)

  
  Kids.Net.Au - Encyclopedia > Pauli exclusion principle
The Pauli exclusion principle is a quantum mechanical principle which states that no two identical fermions may occupy the same quantum state.
The Pauli principle only applies to fermions, particles which form antisymmetric quantum states and have half-integer spin.
This does not violate the Pauli principle because spin is part of the quantum state of the electron, so the two electrons are occupying different quantum states.
www.kids.net.au /encyclopedia-wiki/pa/Pauli_exclusion_principle   (557 words)

  
 Wolfgang Pauli
Pauli was born in Vienna, Austria on August 25, 1900.
Pauli moved to the United States in 1940, where he was Professor of Theoretical Physics at Princeton.
In 1945, Pauli received the Nobel Prize in Physics for his "decisive contribution through his discovery in 1925 of a new law of Nature, the exclusion principle or Pauli principle." He had been nominated for the prize by Einstein.
www.jewishvirtuallibrary.org /jsource/biography/pauli.html   (647 words)

  
 Pauli Exclusion Principle
Pauli observed that relativistic quantum field theory requires that particles with half-integer spin (s=1/2, 3/2,...) must have antisymmetric wave functions and particles with integer spin (s=0, 1,...) must have symmetric wave functions.
For this reason the principle is known as the Pauli Exclusion Principle.
Another consequence of the Pauli Principle is that since the ground state wave function of the He atom must also be anti-symmetric, and since the spatial part of the zeroth order wave function is symmetric,
xbeams.chem.yale.edu /~batista/vvv/node24.html   (155 words)

  
  Nobel Prize in Physics 1945 - Presentation Speech
Pauli showed himself that the electronic configuration is made fully intelligible by the exclusion principle, which is therefore essential for the elucidation of the characteristic physical and chemical properties of different elements.
His principle proved to be an independent and necessary complement to the new quantum theory.
The Pauli principle is therefore essential for the description of the properties of atomic nuclei.
nobelprize.org /physics/laureates/1945/press.html   (806 words)

  
  Pauli exclusion principle Summary   (Site not responding. Last check: 2007-11-07)
The Pauli exclusion principle enabled the quantum structure of the atom to be understood.
The Pauli exclusion principle underlies many of the characteristic properties of matter, from the large-scale stability of matter to the existence of the periodic table of the elements.
It was invented by Pauli in 1924 to explain experimental results in the Zeeman effect in atomic spectroscopy, ferromagnetism, and how the periodic table is regulated by the electron structure of atoms, well before the 1925 formulation of the modern theory of quantum mechanics by Werner Heisenberg and Erwin Schrödinger.
www.bookrags.com /Pauli_exclusion_principle   (4769 words)

  
  Pauli exclusion principle
The Pauli exclusion principle, commonly referred to simply as the exclusion principle, is a quantum mechanical principle formulated by Wolfgang Pauli in 1925, which states that no two identical fermions may occupy the same quantum state.
The Pauli exclusion principle underlies many of the characteristic properties of matter, from the large-scale stability of matter to the existence of the periodic table of the elements.
Another physical phenomenon for which the Pauli principle is responsible is ferromagnetism, in which the exclusion effect implies an exchange energy that induces neighboring electron spins to align (whereas classically they would anti-align).
www.xasa.com /wiki/en/wikipedia/p/pa/pauli_exclusion_principle.html   (775 words)

  
 [No title]
Pauli exclusion principle The requirement for electrons (or other fermions) that the wavefunction for a collection of such particles is antisymmetric under interchange of the position and spin coordinates of any pair of identical particles.
This principle clearly relates the quantum theory to the observed properties of atoms.
The Pauli exclusion principle allows the determination of the maximum number of electrons possible in any given orbital, subshell, or shell.
www.lycos.com /info/pauli-exclusion-principle.html   (342 words)

  
 [No title]
While the exclusion principle as it was initially called had a profound effect initially, it still resonates today and can be found to be applicable and even fail in astronomical situations.
Pauli after looking at spectral data and while a professor at the University of Hamburg in 1924, Pauli proposed that no two electrons in an atom can have the same set of quantum numbers and thus gave birth to the exclusion principle (Pauling 1988).
Pauli postulated that the correct wave function for a helium atom is one in which if you were to switch the positions of electron one with that of electron two the new wave function for electrons would be the negative of the original wave function (Ball 2003).
www.scs.uiuc.edu /~chem440a/hagedorn.doc   (1309 words)

  
 Wolfgang Pauli and the Exclusion Principle
Pauli gave his Nobel Lecture on 13 December 1946 in Stockholm and he began by describing how he came to came to make the discovery.
The exposition of this general formulation of the exclusion principle was made in Hamburg in the spring of 1925, after I was able to verify some additional conclusions concerning the anomalous Zeeman effect of more complicated atoms during a visit to Tübingen with the help of the spectroscopic material assembled there.
With the exception of experts on the classification of spectral terms, the physicists found it difficult to understand the exclusion principle, since no meaning in terms of a model was given to the fourth degree of freedom of the electron.
www-groups.dcs.st-and.ac.uk /~history/Extras/Pauli_Exclusion_Principle.html   (1637 words)

  
 Pauli Exclusion Principle
One expression of the Pauli Exclusion Principle is that “no two electrons in the same atom can be in the same quantum state.” [1] This means that no two electrons can have the same set of quantum states of: 1) energy, 2) angular momentum magnitude, 3) angular momentum orientation, and 4) orientation of intrinsic spin.
Pauli's Principle is based on the fact that any two given electrons are indistinguishable from one another and thus changing the designations between two or more electrons in different quantum states should have no observable effect.
The Pauli Exclusion Principle is as fundamental a characteristic of Quantum Physics as there is. Albert Einstein and his colleagues Poldalsky and Rosen attempted in their theoretical EPR Paradox to argue against the very viability of Quantum Physics.
www.halexandria.org /dward149.htm   (858 words)

  
 Pauli exclusion principle
The Pauli exclusion principle is an assertion that no two electrons in an atom can be at the same time in the same state or configuration, proposed (1925) by the Austrian physicist Wolfgang Pauli to account for the observed patterns of light emission from atoms.
Particles obeying the exclusion principle have a characteristic value of spin, or intrinsic angular momentum; their spin is always some odd whole-number multiple of one-half.
The Pauli exclusion principle indicates that, if one of these states is occupied by an electron of spin one-half, the other may be occupied only by an electron of opposite spin, or spin negative one-half.
abyss.uoregon.edu /~js/glossary/pauli_exclusion_principle.html   (313 words)

  
 Pauli's principle   (Site not responding. Last check: 2007-11-07)
Pauli's principle, also known as Pauli's exclusion principle, was proposed by Wolfgang Pauli in 1925.
On the basis of the multiplet structure of the atomic spectra and the anomalous Zeeman effect, which was not able to be interpreted for a long time, Pauli realized that the peculiar, classically non-describable type of ambiguity of the quantum theoretical properties of the luminous electron demands for its description a fourth quantum number.
In 1945 Wolfgang Pauli was awarded the Nobelpreis for his discovery of the exclusion principle.
www.ethbib.ethz.ch /exhibit/pauli/ausschliessung_e.html   (268 words)

  
 Chapter 7 The Pauli Exclusion Principle   (Site not responding. Last check: 2007-11-07)
with the postulate of Austrian physicist Wolfgang Pauli (1900-1958): In a...
the aufbau principle, the Pauli exclusion principle, and Hund's rule.
Be able to define and apply the Pauli exclusion principle...
www.best-debt-consolidation.com /OPG/chapter-7-the-pauli-exclusion-principle.html   (291 words)

  
 Chapter 7 The Pauli Exclusion Principle   (Site not responding. Last check: 2007-11-07)
Pauli Exclusion Principle : No two electrons in the same atom can have the same set of quantum...
Pauli exclusion principle: No two electrons in an atom can have...
After having read and studied Chapter 7, the student should be able to: Apply the Hund Multiplicity rule and the Pauli Exclusion Principle in...
www.best-in-debt-consolidation.com /OPG/chapter-7-the-pauli-exclusion-principle.html   (165 words)

  
 fUSION Anomaly. Wolfgang Pauli
Exclusion Principle, in physics and chemistry, fundamental principle stating that two electrons cannot simultaneously occupy the same energy state in an atom.
This principle, which explains the regularities of the periodic law, was developed in 1925 by Austrian-American theoretical physicist Wolfgang Pauli.
The Pauli exclusion principle also applies to free electrons and to protons and neutrons in the nucleus.
fusionanomaly.net /wolfgangpauli.html   (603 words)

  
 AAAS - AAAS Resources on the Cosmos
As a result of that and the Pauli exclusion principle then you have the periodic table.
But at the level of chemistry, which is the huge level for biology having those elements, and also in the Pauli principle is the covalent bond, metallic structure, crystal structure it's all in that one principle.
But certainly the Pauli principle, we have this one super example of a simple symmetry principle which generates all chemistry from physics.
www.aaas.org /spp/dser/petworkshop/rolstondiscussion1.shtml   (578 words)

  
 Pauli Exclusion Principle
This is an example of a general principle which applies not only to electrons but also to other particles of half-integer spin (fermions).
The nature of the Pauli exclusion principle can be illustrated by supposing that electrons 1 and 2 are in states a and b respectively.
The Pauli exclusion principle is part of one of our most basic observations of nature: particles of half-integer spin must have antisymmetric wavefunctions, and particles of integer spin must have symmetric wavefunctions.
hyperphysics.phy-astr.gsu.edu /hbase/pauli.html   (224 words)

  
 What's the Pauli-exclusion Principle?
In 1925, Wolfgang Pauli gave physics his exclusion principle as a way to explain the arrangement of electrons in an atom.
That is, each electron in an atom has a unique set of quantum numbers (the principle quantum number which gives its energy level, the magnetic quantum number which gives the direction of orbital angular momentum, and the spin quantum number which gives the direction of its spin).
If this principle did not hold, all of the electrons in an atom would pile up in the lowest energy state (the K shell).
www.physlink.com /Education/AskExperts/ae455.cfm   (148 words)

  
 P221TOPICS: PAULI EXCLUSION
The Pauli exclusion principle states that; "No two electrons in an atom can ever be in the same quantum state; that is, no two electrons in the same atom can have the same set of quantum numbers"(Serway 860).
The exclusion principle was formulated by a young and promising Theoretical Physicist from Austria in 1926.
His major accomplishments, aside from the formulation of the exclusion principle, included: indicating the connections between spin and statistics, theories of relativistic quantum electrodynamics, the neutrino hypothesis, and the hypothesis of nuclear spin (Serway 861).
www.upei.ca /~physics/p221/topics/pauli.htm   (542 words)

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