Why Does Every Compound Burn With a Green Flame?

An instrumentalist is someone who regards a theory as useful only in so far as it can predict the outcome of experiments. This has not really happened before, ever, in the history of science. It wild be rather like wher niels bore came up with some of the early foundational parts of atomic theory. His model of the atom helps us to explain why the flames of certain elements, when they burn, or certain compounds at all, have a particular colour.