| The Columbia Encyclopedia, Sixth Edition. 2001-07. |
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| transactinide elements |
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(tr ns´´ k´t n d´´) (KEY) , in chemistry, elements with atomic numbers greater than that of lawrencium (at. no. 103), the last member of the actinide series. See transuranium elements. |
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| | | The Columbia Encyclopedia, Sixth Edition. Copyright © 2007 Columbia University Press. |
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