Does anyone know any significant contributions an alchemist made to alchemy as related to chemistry?

Question

Ok, so I'm doing a chemistry project and my topic is alchemy. I have to relate alchemy to atmoic theory. The main thing I already know is that alchemy was the beggingings of chemistry, hence the word "chemia". Any contributions with where you got the info would be extremley helpful. Thanks! ^_^

Answer 1

Probably the earliest alchemic notation was CaCO3 + Heat -> CaO + CO2 by the ancient Egyptians. This may have led to modern concrete & the pyramids.

Answer 2

gunpowder, by the Chinese 4000 years ago. Chinese alchemists were looking for the elixer of youth and blew themselves up instead....