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This was the first scientific discovery of an element.
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masses in motion was proposed by Isaac Newton.
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His theory is about spherical solid atoms based upon measurable properties of mass.
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He proposed that nature contained triads of elements the middle element had properties that were an average of the other two members when ordered by the atomic weight.
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it consisted of Chlorine, Bromine and Iodine.
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He studied the effect of electricity on solution and "electrolysis". he developed the law of electrolysis.
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He built the first discharge gas tube.
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He classified elements into six families by their valance
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He arranged elements into seven groups with similar properties. He discovered the properties of elements known as the periodic law.
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He proposed electric and magnetic fields filled the void
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Discovered cathode rays
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He studied "Canal Rays"
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He proposed that electricity was made out of negative energy and called it electrons.
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He experimented and eventually found "x-rays"
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he discovered some chemicals spontaneously decompose and give off very pentrating rays.
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Figured out mass was concentrated in the nucleus.
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He discovered the size of an atom and that canal rays are associated with proton H+