Policia científica science bits. Unidad “las substancias se transforman” science bits 2do ESO(8th grade). Como se hace el trabajo?

The answer to your q the total mass is 73

Firstly, the planetary model of the atom  failed  to explain why individual atoms produce discrete  line spectra. in fact, according to rutherford's model, each individual atom should produce a  continuous  line spectrum. the second flaw to his model was the fact that electrons orbit the nucleus in a circular fashion.

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The answer is a. good luck : )