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Article: Transactinides
- Article from:
- Chemistry: Foundations and Applications
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CopyrightCOPYRIGHT 2004 The Gale Group, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Transactinides
The term "transactinides" is used to refer to all elements beyond the actinides
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that is, those elements with atomic numbers larger than 103. Lawrencium, with atomic number 103 and a full inner 5f electron shell, ends the actinide series. According to atomic relativistic calculations, the filling of the 6d electron shell takes place in the first nine of the transactinide elements (those with atomic numbers 104 through 112). They are placed as a 6d transition series under the 5d transition series in the Periodic Table of the chemical elements.
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As of 2003 the discoveries of elements 104 through 111 had been confirmed, and element 112 was reported but not yet ...