Bohrs model says that electrons move in fixed shells (which have fixed distances) around the nucleus of an atom.
Answer:
mining of clay limestone and then heated to a certain temperature of 1450⁰ in a cement kiln
I thinlk it's by radiation?......
Salt dissolving in a glass of water, using electricity to break down water into hydrogen and oxygen, rust forming on an iron fence and gas burning on a stove.