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metals were found. it was recorded and listed in conjunction with heavenly bodies.
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Pope John XXII (the pope at the time) issued an edict against gold-making, it continues despite the lack of good metals to make gold out of it. the materials they had were cheap metals to make gold out of it. the heap metals never worked and gold never happened.
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Alchemists not only wanted to convert metals to gold, but they also wanted to find a chemical concoction that would enable people to live longer and cure all ailments. this never happened.
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The disproving of Aristotle's four-elements theory. the book, the skeptical chemist combined to destroy this early form of chemistry.
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John Dalton publishes his Atomic Theory which states that all matter is composed of atoms, which are small and indivisible.
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Eugene Goldstein discovered positive particles by using a tube filled with hydrogen gas. The positive particle had a charged opposite to the electron. It also had a mass of 1.66E-24 grams or one atomic mass unit. The positive particle was named the proton.
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Wilhelm Roentgen accidentally discovered x-rays while researching the glow produced by cathode rays. Roentgen performed his research on cathode rays within a dark room and during his research, he noticed that a bottle of barium platinocyanide was glowing on a shelf.
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Henri Becquerel was studying the fluorescence of pitchblende when he discovered a property of the pitchblende compound. Pitchblende gave a fluorescent light with or without the aid of sunlight.
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John Ambrose Fleming creates the first vacuum tube.
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Albert Einstein and Enrico Fermi both warned the United States about Germany's extensive research on atomic fission reaction. the United States developed the very first working nuclear fission reactor. The Manhattan Project was in process.
