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Antoine Lavoisier wrote the first list of elements which contained 33 elements being distinguished between metals and non metals
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Dalton's Law came about describing the relationship between the elemnts and mixtures of gasses
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John Dalton proposed the atomic theory.
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Jakob Berzelius made a table of atomic weights and introduced symbolism by using letters to reconize the elements
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De Chancourtois assembled the first periodic table classifying elements in a order based on physical and chemical properties
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Lothar Meyer makes a early version of the periodic table with 28 elements organized by valence.
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Dmitri Mendeleev made a element periodic table with 66 known elements organzined by atomic weights and elements with simmilar properties were grouped up
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John Newlands aranged in order of tomic weights and looked at the similartites between the 1st and 9th elemnt. He discoverd the Law Of Octaves.
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Lothar Meyer compleated a table of 56 emelemnts based of propities. and were arranged in order of atomic weight
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William Ramsay discoverd the noble gasses
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Lord Raylegh discoverd argon
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William Ramsey helped the discovery of a group with zero velocity which helped with the discovery of neon
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Ernest Rutherford discoverd the nuclear chnage of a nucleous is the same as the atomic mass
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All elements got a atomic number
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Henry Mosley discoverd the isotopes of elements