Lanthanum (La) and Actinium (Ac) Should Remain in the d-block.

• Autores: Laurence Lavelle
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 85, Nº 11, 2008, págs. 1482-1484
• Idioma: inglés
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• Resumen

  • 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).