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Date: 2014-03-13 16:15:18Chemical element Transition metal Actinide Ununtrium Book:Period 7 elements Periodic table Chemistry Matter | Periodic Table of the Elements 1A 8A http://chemistry.about.comAdd to Reading ListSource URL: www.biomonitoring.ca.govDownload Document from Source WebsiteFile Size: 57,49 KBShare Document on Facebook |