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actinide |
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actinideAny of a series of 15 radioactive metallic chemical elements with atomic numbers 89 (actinium) to 103 (lawrencium). Elements 89 to 95 occur in nature; the rest of the series are synthesized elements only. Actinides are grouped together because of their chemical similarities (for example, they are all bivalent), the properties differing only slightly with atomic number. The series is set out in a band in the periodic table of the elements, as are the lanthanides. |
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? Mentioned in | ? References in periodicals archive | ||
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| The emphasis of this announcement is on the
ions, complexes, and organometallic compounds of the transition metals
known as lanthanides and actinides, post-transition metals, and
metalloid elements. Vaseline glass is mildly
radioactive, a property shared by all of the actinide elements, but the
mystery element was banned for use as a coloring agent in the 1940s. Wong synthesized the first known
lanthanide and actinide porphyrin complexes. |
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actinide
