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Encyclopediatransactinide elementstransactinide elements (trăns"ăk'tunīd") [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. The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved. More on transactinide elements from Infoplease:
- roentgenium - roentgenium roentgenium, artificially produced radioactive chemical element; symbol Rg; at. no. ...
- rutherfordium - rutherfordium rutherfordium , artificially produced radioactive chemical element; symbol Rf; at. ...
- hassium - hassium hassium , artificially produced radioactive chemical element; symbol Hs; at. no. 108; mass ...
- ununhexium - ununhexium ununhexium , artificially produced radioactive chemical element; symbol Uuh; at. no. ...
- ununoctium - ununoctium ununoctium , artificially produced radioactive chemical element; symbol Uuo; at. no. ...
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