A investigacao da estrutura da matéria no início do século XX: Niels Bohr e a busca de explicações para a estabilidade do átomo

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

The aim of this abstract is to study the formulation of Niels Bohrs atomic model in the beginning of the twentieth century, regarding the atomic model of Rutherford. The issues about instability resulting from this model and the observation that the classical mechanic could not express the atomic reality were both intensively approached themes those days. Besides that, spectroscopy data showed that the raising of spectral lines, characteristic of chemical elements, should be explained by an atomic model. The classical mechanic is replaced in the analysis of the atomic phenomena under Bohrs atomic model. After Max Plancks ideas, the energy from the atomic processes is not absorbed nor is it continually freed. Actually it is found in the form of energy packages called quanta. To develop his atomic model, Bohr uses studies from Rutherford experiments as well as works about the spectral lines observed from spectroscopic analyses on chemical elements, in which each chemical element can be identified from the light spectrum emitted when this element after receiving energy changes the orbit and remains unstable, freeing an amount of energy in the form of light at the moment that it returns to its stable state

ASSUNTO(S)

atomic model fisica bohr, niels -- 1885-1962 -- contribuicoes em formulacao do modelo atomico historia das ciencias atomos -- modelos modelo atômico

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