exclusion principle
exclusion principle Basic law of quantum mechanics, proposed by Wolfgang Pauli in 1925, stating no two electrons in an atom can possess the same energy and spin. More precisely, the set of four quantum numbers characterizing certain elementary particles called fermions must be unique.
exclusion principle
exclusion principle A principle introduced in 1934 by the Russian ecologist G. F.Gause (1910–86), that two species cannot coexist in the same locality if they have identical ecological requirements.
exclusion principle
exclusion principle See COMPETITIVE-EXCLUSION PRINCIPLE.
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Principle , PRINCIPLE
Something first in a certain order, upon which anything else follows. An order of before and after is found in many things and in different… Competitive Exclusion Principle , competitive exclusion principle(exclusion principle, Gause principle) The principle that two or more resource-limited species, having identical patte… Archimedes Principle , Archimedes' principle Observation by Archimedes that a body immersed in a fluid is pushed up by a force equal to the weight of the displaced fluid. H… fermion , fermion Subatomic particle that has a half-integer spin. Fermions are particles that obey the exclusion principle that no two electrons can have the… Boson , boson Elementary particle that has an integer spin. Named after the Indian physicist Satyendranath Bose, bosons are those particles not covered by th… Precautionary Principle , The Precautionary Principle is referred to in the 1992 Rio Declaration on Environment and Development; the declaration includes the principle, "Natio…
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