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actinide |
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actinideAny of the series of 15 consecutive chemical elements in the periodic table from actinium to lawrencium (atomic numbers 89–103). All are radioactive heavy metals; and only the first four (actinium, thorium, protactinium, and uranium) occur in nature in appreciable quantities. The other 11 (the transuranium elements) are unstable and are produced only artificially. Actinides are transition elements, so their atoms have similar configurations and similar physical and chemical behaviour; the most usual valences are 3 and 4. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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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. 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. Argonne's only Idaho nuclear program slated to survive is a
facility being renovated to produce fuel rods containing actinides,
which would test whether these heavy elements from spent fuel could be
"burned" to yield power (SN: 3/20/93, p. |
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