Spedding, Frank H. Formerly, Ames Laboratory, Energy Research and Development Administration, Iowa State University, Ames, Iowa.
Last reviewed:January 2020
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A chemical element, Y, atomic number 39, and atomic weight 88.905. Yttrium resembles the rare-earth elements closely. The stable isotope 89Y constitutes 100% of the natural element, which is always found associated with the rare earths and is frequently classified as one. See also: Periodic table
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