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actinide
(redirected from actinide series)

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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.
A chemical glance at short-lived elements by Peterson, Ivars / Science News
 
 
 
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