biointermediate elements
biointermediate elements Elements that are partially depleted in surface waters as a result of biological activity. Four such elements are known: Ba, Ca, C, and Ra. Compare biolimiting elements and biounlimiting elements.
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biolimiting elements Transuranium Elements , transuranium elements, in chemistry, radioactive elements with atomic numbers greater than that of uranium (at. no. 92). All the transuranium element… Trace Elements , Trace elements, also sometimes called microminerals, are chemicals that are required by organisms in very small quantities for proper physiological a… Francium , Francium (revised)
Note: This article, originally published in 1998, was updated in 2006 for the eBook edition.
Overview
Francium is an alkali metal,…
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biointermediate elements