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actinide
(redirected from actinide series)

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson 0.03 sec.
ac·ti·nide (kt-nd)
n.
Any of a series of chemically similar radioactive elements with atomic numbers ranging from 89 (actinium) through 103 (lawrencium).


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However, recent experiments show that hahnium has a number of chemical properties resembling those of protactinium, a naturally occuring element situated beside uranium in the so-called actinide series.
 
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