The Development of atomic theory. Chemistry Rules!. Philosophical Era (Ancient Greece). Two ancient Greeks stand out in the advancement of chemistry. Their ideas were purely based on reason, without experimental support (as was common in that time). Philosophical Era.
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Philosophical EraAristotle (384-322 BCE)
The “Dark Ages” of Chemistry where early chemists had to work in secret and encode their findings for fear of persecution
Alchemy had to be discussed in secret so that its students could avoid persecution
(No such problems in the Far East –Hence gunpowder)
The printing press heralds the widespread transfer and acquisition of knowledge
The relatively quick discovery of things smaller than the once “indivisible” atom
The Quark Era starts in 1964, but that advance can be regarded as outside the realm of chemistry – instead a part of nuclear physics