Espectro de raias dos elementos químicos : uma sugestão de aplicação para o ensino médio

Abstract

In the course of all the praxis related to the teaching of Physics, the students' interest in subjects whose theme deals with Modern and Contemporary Physics is perceptible: atomic models, quantization, nature of light, luminous phenomena, chemical composition of planets, stars, comets and the like, in addition to the identification of samples of substances. Many of these phenomena have scientific explanations and concepts that may differ from the student's level or even the contents related to these events/phenomena may not be part of the pedagogical project of the course in which they are inserted. Thus, thinking of an approach that can minimally contemplate the aforementioned theme, in a High School scenario, as well as clarifying the 2018 BNCC, this work deals with the spectroscopic effect observed from different light sources in whose composition/construction is added some chemical element (more specifically sodium and mercury), in such a way that, through the observation of their streak spectrum, patterns of comparison and identification of components can be found.