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  Home > JCE Print > Journal of Chemical Education > Issues > 2008  > November  >
Chemical Education Today
Commentary
Lanthanum (La) and Actinium (Ac) Should Remain in the d-block
Laurence Lavelle
Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA 90095
Cover
November 2008
Vol. 85 No. 11
p. 1482
Abstract
This paper discusses the reasons and implications of placing lanthanum (La) and actinium (Ac) in the f-block and lutetium (Lu) and lawrencium (Lr) in the d-block. The author's conclusion is that placing lanthanum (La) and actinium (Ac) in the f-block results in a less satisfactory presentation of the elements in the periodic table and that lanthanum (La) and actinium (Ac) should remain in the d-block below yttrium (Y) in group 3 (IIIB).
More Information
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Citation
Lavelle, Laurence. J. Chem. Educ. 2008, 85, 1482.
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Keywords
Actinium; Atomic Properties / Structure; First-Year Undergraduate / General; Inner Transition Elements; Inorganic Chemistry; Interdisciplinary / Multidisciplinary; Lanthanum; Lawrencium; Lutetium; Misconceptions / Discrepant Events; Periodicity / Periodic Table; Transition Elements
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History
Created:
Last Updated:
9/19/2008
9/24/2008
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