Classificação periódica: um exemplo didático para ensinar análise de componentes principais

Química Nova

Wellington Da Silva Lyra²  Edvan Cirino Da Silva²  Mario Cesar Ugulino De Araújo²  Wallace Duarte Fragoso²  Germano Veras¹ 

[1] ,Universidade Federal da Paraíba Departamento de Química João Pessoa PB ,Brasil

关键词: principal components analysis;    semimetals;    chemical properties of the elements;   

DOI  :  10.1590/S0100-40422010000700030

来源: SciELO

【 摘 要 】

A dataset of chemical properties of the elements is used herein to introduce principal components analysis (PCA). The focus in this article is to verify the classification of the elements within the periodic table. The reclassification of the semimetals as metals or nonmetals emerges naturally from PCA and agrees with the current SBQ/IUPAC periodic table. Dataset construction, basic preprocessing, loading and score plots, and interpretation have been emphasized. This activity can be carried out even when students with distinct levels of formation are together in the same learning environment.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License