First write a balanced reaction for this decomposition. What mass of aluminum is produced by the decomposition of 3.1 kg of Al2O3?
Answer in units of kg.

Not a  mixture of two common elements that can be separated by physical means.

The answer this would be radiative zone

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.