Actinoid
An actinoid or actinide[Note 1] is an element with an atomic number between 89 and 103, that is, one of Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No or Lr.[1] Although actinoid means "like actinium" and so should not include actinium itself, Ac is usually included in modern usage.[1][2] The idea of a series of fourteen elements (now fifteen) analogous to the lanthanoids was proposed by Glenn Seaborg in 1946.[3]
Notes and references
Notes
References
- ↑ 1.0 1.1 1.2 Nomenclature of Inorganic Chemistry; IUPAC Recommendations 2005; Royal Society of Chemistry: Cambridge, 2005; pp 51–52. ISBN 0-85404-438-8, <http://www.iupac.org/publications/books/rbook/Red_Book_2005.pdf>.
- ↑ Periodic Table of the Elements; International Union of Pure and Applied Chemistry (IUPAC), <http://old.iupac.org/reports/periodic_table/index.html>. (accessed 25 December 2010).
- ↑ Seaborg, Glenn T. The Transuranium Elements. Science 1946, 104, 379–86. DOI: 10.1126/science.104.2704.379.
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