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Actinium   Listen
noun
Actinium  n.  (Chem.) A supposed metal, said by Phipson to be contained in commercial zinc; so called because certain of its compounds are darkened by exposure to light.






Collaborative International Dictionary of English 0.48








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"Actinium" Quotes from Famous Books



... of the radioactive elements has brought out evidence that all three lines of radioactive descent known to us—i.e. those beginning with uranium, with thorium, and with actinium—alike converge to lead.[1] There are difficulties in the way of believing that all the lead-like atoms so produced ("isotopes" of lead, as Soddy proposes to call them) actually remain as stable lead in the minerals. ...
— The Birth-Time of the World and Other Scientific Essays • J. (John) Joly



Words linked to "Actinium" :   chemical element, atomic number 89, ac



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