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chemical element > transition element
society > social process > development pattern > transition > transition element

Preferred term

transition element  

Definition

  • One of a group of metallic elements in which the members have the filling of the outermost shell to 8 electrons interrupted to bring the penultimate shell from 8 to 18 or 32 electrons; includes elements 21 through 29 (scandium through copper), 39 through 47 (yttrium through silver), 57 through 79 (lanthanum through gold), and all known elements from 89 (actinium) on.

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URI

http://www.eionet.europa.eu/gemet/concept/8629

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