illinium


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Related to illinium: Element 61

illinium

(ĭlĭn`ēəm): see promethiumpromethium
, artificially produced radioactive chemical element; symbol Pm; at. no. 61; mass no. of most stable isotope 145; m.p. 1,042°C;; b.p. 3,000°C; (estimated); sp. gr. unknown; valence +3.
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illinium

[ə′lin·ē·əm]
(nuclear physics)