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German merchant Hennig Brand attempted to create a Philosopher's Stone, an object that supposedly could turn metals into pure gold. This was the fist discovery of phosphorus.
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At least 47 elements were discovered and scientists began to see a pattern in characteristics
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English chemist John Newlandsdivided than discovered 56 elements into 11 groups
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Russian Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass.
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Sir William Ramsay & Lord Rayleigh discovered the noble gasses
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English Physicist J.J. Thomson first discovered electrons
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Rutherford & German physicist Hans Geiger discovered that electrons orbit the nucleus of an atom
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Rutherford first identified protons in atomic mass
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James Chadwich fist discovered neutrons