EXCLUSION PRINCIPLE

physical principle enunciated by Wolfgang Pauli in 1925 stating that no two electrons in an atom can occupy the same energy state simultaneously. The energy states, or levels, in an atom are described in the quantum theory by various values of four different quantum numbers; the exclusion principle holds that no two electrons can have the same four quantum numbers in an atom. One of these quantum numbers describes one of the two possible directions for the electron's intrinsic spin. As a result of the exclusion principle, two electrons that are in the same energy level as described by the other three quantum numbers are differentiated from each other because they have opposite spins. This principle applies not only to atoms but to other systems containing particles as well, and it applies not only to electrons but also to a large class of particles collectively known as fermions (see elementary particles).

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Exclusion Principle
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books on: Exclusion Principle  - 8190 results

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1.
The Anthropic Cosmological Principle
Book by John D. Barrow, Frank J. Tipler; Oxford University Press, 1988
Subjects: Anthropic Principle, Human Beings, Intellect, Life On Other Planets, Science--Philosophy
The Exclusion Principle can be formulated by stating that no...available energy--the ground state. The Exclusion Principle can also be formulated as...confinement of a single panicle. The exclusion energy is thus . Technically, only...
2.
Ethics without Principles
Book by Jonathan Dancy; Clarendon Press, 2004
Subjects: Principle (Philosophy)
...that I could formulate a principle to back this up (1998...complex formulations, as each principle contains more and more exclusion clauses specifying its relation to all other principles (i.e. saying clearly...be able to elaborate our principle in the light of our understanding...
3.
Social Exclusion
Book by David Byrne; Open University Press, 2005
Subjects: Marginality, Social
...inability to combat social exclusion, 175-6 postindustrial and...inequality, 109-14 and spatial exclusion, 129-31 1 third way policy...93 strong version of social exclusion, 4-5 subsidiarity, principle of, 29, 31 1 subsidies...
4.
Nationalist Exclusion and Ethnic Conflict: Shadows of Modernity
Book by Andreas Wimmer; Cambridge University Press, 2002
Subjects: Ethnic Groups--Political Activity, Immigrants--Political Activity, Minorities--Political Activity, National State, Nationalism
Such processes of exclusion are structurally homologous to those directed against ethnic...ideals of the Enlightenment was bound up with new forms of exclusion based on the principle of ethnicity and nationhood. It has been the central aim...
5.
Challenges to School Exclusion: Exclusion, Appeals, and the Law
Book by Neville Harris, Karen Eden, Ann Blair; Routledge Falmer, 2000
Subjects: Student Expulsion--Great Britain, Student Expulsion--Law And Legislation--Great Britain
...However, if this general principle were also adopted by education...over the question whether an exclusion appeal should be brought...will soon have to do so in exclusion cases. 20 The UN Committee...other decisions, including exclusion from school, the child is...to appeal against school exclusions be assured ibid.: 6 . As...
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journal articles on: Exclusion Principle  - 7775 results

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1.
Disability and Social Policy in Britain since 1750: A History of Exclusion
Journal article by Jameel Hampton; Canadian Journal of History, Vol. 41, 2006
Subjects: Books--Book reviews, Disability and Social Policy in Britain since 1750: A History of Exclusion (Book)--Book reviews
...that contributed to the overall exclusion of disabled people. The second...method of taking the theoretical principle of "exclusion" and very selectively appealing...for the social and economic exclusion of disabled people. Specialists...
2.
Social Exclusion and Social Solidarity: Three Paradigms
Journal article by Hilary Silver; International Labour Review, Vol. 133, 1994
Subjects: Comparative studies, Economic models, Europe, Exclusion, France, Labor economics, Political systems, Social policy, Welfare
...differences produce exclusion depends on such issues...as in John Rawlss principle of difference or Adam...41). Christian principles of social integration...perspective on the issue of exclusion. On the one hand...that inequalities and exclusions are not the same...Unlike inequality, exclusion is associated with...
3.
A Comparative Approach to Social Exclusion: Lessons from Fr
Journal article by Isabel Yepel Del Castillo; International Labour Review, Vol. 133, 1994
Subjects: Comparative studies, Employment policies, Exclusion, France, Manycountries, Social policy, Sociology, Welfare economics
...from the same principle of desegmentation...policies to combat exclusion, its objectives...French debate on exclusion are extremely...two underlying principles which are common...of these two principles, social exclusion may be considered...
4.
The Politics of Exclusion in Early Renaissance Florence
Journal article by Thomas Kuehn; Renaissance Quarterly, Vol. 61, 2008
Subjects: Books--Book reviews, The Politics of Exclusion in Early Renaissance Florence (Book)--Book reviews
...another defining political exclusion, that of the magnates...time there was not mass exclusion from the city, but there...government. Punitive mass exclusion resurfaced in the early...with the guilty on a principle of collective responsibility...
5.
Jona M. Rosenfeld and Bruno Tardieu, Artisans of Democracy: How Ordinary People, Families in Extreme Poverty, and Social Institutions Become Allies to Overcome Social Exclusion
Journal article by David Kahane; Social Theory and Practice, Vol. 28, 2002
Subjects: Artisans of Democracy: How Ordinary People, Families in Extreme Poverty, and Social Institutions Become Allies to Overcome Social Exclusion (Book)
...ontology, whereby social exclusion exacts costs for all members...book: its account of social exclusion as a violation of ethical principles immanent in the practices...service. When party to social exclusion, these institutions are...
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magazine articles on: Exclusion Principle  - 1061 results

       More magazine Results: 1-10 11-20 21-30 31-40 41-50 >>  
 
1.
Education and the Freedom from Exclusion
Magazine article by Colette Mazzucelil; UN Chronicle, Vol. 38, June 2001
Subjects: Education--Influence, Ethnic relations--Information services, Internet--Usage
...and the freedom from exclusion by Colette Mazzucelil...interpret to establish the principle which, in my view...defined as freedom from exclusion, in that "everyone...call for freedom from exclusion as a human right. This...
2.
The Politics of Exclusion: Black Students Fight Back
Magazine article by Barbara Ransby; The Nation, Vol. 246, March 26, 1988
Subjects: African American students--Political activity, African Americans, African Americans--Race identity, Black identity, Student movements--Influence, Student protests--Influence
...often invisible policies of exclusion and discrimination against...administrators will agree in principle that the universitys goal...phrases of the politics of exclusion. The criteria for determining...correct it." The politics of exclusion are as much in place in the...
3.
The Precautionary Principle and Food Policy: Part Ii
Magazine article by Sue Davies; Consumer Policy Review, Vol. 12, May/Jun 2002
Subjects: European Union, Food safety, International, Social policy, United Kingdom, World Trade Organization
...that recourse to the precautionary principle begins with a scientific evaluation...offers the following five general principles of application. (i) Measures...interim basis in line with the stated principles; - whether the guidelines should...explicit reference to the precautionary principle; and, - whether precaution is...to put the issue of terminology (principle or approach) to one side in order...Encouragingly, the draft working principles do acknowledge that precaution is...
4.
Attaining Peace in Divided Societies: 5 Principles of Emerging Doctrine
Magazine article by Ted Robert Gurr; World and I, Vol. 19, October 2004
Subjects: Afghanistan--Demographic aspects, Afghanistan--Political aspects, Countries--Demographic aspects, Germany--Demographic aspects, Germany--Political aspects, Indonesia--Demographic aspects, Indonesia--Political aspects, South Africa--Demographic aspects, South Africa--Political aspects
...the extent to which these principles have been implemented in...social practice of deliberate exclusion. No formal exclusion. Protective...are clear evidence that the principles of minority rights promoted...as a matter of ideological principle, though informal discrimination...suggests just how widely Western principles of minority rights have been...
5.
Liberty for All: Democracy in Practice & Principle
Magazine article by Jeffrey Stout; Commonweal, Vol. 137, September 24, 2010
Subjects: Democracy--Analysis, Democracy--United States, Freedom--Analysis, Liberty--Analysis, Political reform--Analysis
...All: Democracy in Practice Principle. by Jeffrey Stout When Abraham...did not entail an arbitrary exclusion. Liberty and justice were...domination as a matter of principle and, where prudent, also as a matter of principle and where prudent, also...the dominated without moral principles to apply to the arbitrary...
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newspaper articles on: Exclusion Principle  - 176 results

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1.
Our Principles Demand the Exclusion of the Unqualified
Newspaper article; Western Mail (Cardiff, Wales), October 14, 2004
Our Principles Demand the Exclusion of the Unqualified. Byline: By...been a union that stands by strong principles with a total commitment to defending...colleagues who are taking a stand on a principle so central to the profession...
2.
Benefits System Is 'Agent of Exclusion'
Newspaper article by John Deane; The Birmingham Post (England), March 27, 2000
...combat problems of social exclusion, many of Labours welfare...ever-more powerful agent of exclusion". Mr Field put forward the...reform, have undermined the principle of work, mocked the idea...ever-more powerful agent of exclusion." Mr Field argued that the...
3.
Politics : UUP Sits out Exclusion Motion
Newspaper article; The News Letter (Belfast, Northern Ireland), February 9, 2000
Politics : UUP Sits out Exclusion Motion. THE Ulster Unionists came...DUP motion, calling for Sinn Feins exclusion from the Executive, to be debated...prepared to resign as a matter of principle. By doing so, we are keeping Sinn...
4.
Ampatuans Urge DoJ to Expedite Resolution on Exclusion
Newspaper article; Manila Bulletin, September 13, 2010
...Ampatuans Urge DoJ to Expedite Resolution on Exclusion. MANILA, Philippines - After the National...resolution of their appeal for their exclusion in Maguindanao massacre.De Lima was...the crime. "Applying therefore the principle of falsus in uno, falsus in omnibus...
5.
Exclusion May Bring Benefits - Hulme; SWIMMING
Newspaper article; The Journal (Newcastle, England), June 5, 2010
Subjects: Commonwealth games, Swimming
Exclusion May Bring Benefits - Hulme; SWIMMING. NORTH East swimmer Ian Hulme insists...work on a lot." THE nations leading energy supplier British Gas is the Principle Partner of British Swimming, and have pledged pounds 15m to support the...
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encyclopedia articles on: Exclusion Principle  - 17 results

       More encyclopedia Results: 1-10 11-17 >>  
 
1.
Exclusion Principle
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
EXCLUSION PRINCIPLE physical principle enunciated by Wolfgang...four different quantum numbers; the exclusion principle holds that no two electrons...intrinsic spin. As a result of the exclusion principle, two electrons that are...
2.
Elementary Particles
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...particles restricted by the Pauli exclusion principle ; particles obeying the Fermi...particles not covered by the exclusion principle, and such particles are known...conservation laws are three symmetry principles that apply to changing the...
3.
Nucleus , in Physics
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...they were particles of a gas restricted by the Pauli exclusion principle , which allows only two particles of opposite spin...very short span of time allowed by the uncertainty principle . It is now known, however, that at a more fundamental...
4.
Pauli, Wolfgang
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...Physics for his enunciation (1925) of the Pauli exclusion principle , fundamental to quantum mechanics, according to...that certain other particles also are governed by the principle. Among his many other achievements was the postulation...
5.
Magnetism
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...magnetic field. In the case of many atoms, all the electrons are paired within energy levels, according to the exclusion principle , so that the electrons in each pair have opposite (antiparallel) spins and their magnetic fields cancel. In...
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