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Comes up with a list of 33 elements (first extensive list)
Distinguished metals from non-metals -
John Dalton proposes law describing the relationship between the components in a mixture of gases. (Looks a bit too much like Gabe Newell)
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Jakob Berzelius developed a table of atomic weights & introduced letters to symbolize elements
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Johann Dobereiner developed groups of 3 elements with similar properties
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John Newlands arranged the known elements in order of atomic weights & observed similarities between some elements
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Lothar Meyer develops an early version of the periodic table, with 28 elements organized by valence
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Dmitri Mendeleev produced a table based on atomic weights but arranged 'periodically' with elements with similar properties under each other. His Periodic Table included the 66 known elements organized by atomic weights.
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William Ramsay discovered the Noble Gases. It was hard to discover and took so long because Noble Gases hardly react with anything.
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Marie and Pierre Curie isolated radium and polonium from pitchblende. This was a great strive in science, finding out about radioactivity and its harmful effects on the human body unfortunately.
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Ernest Rutherford discovered the source of radioactivity as decaying atoms. Mrs. Curie didn't die painfully for nothing.
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Henry Moseley determined the atomic number of each of the elements and modified the 'Periodic Law'. He determined the atomic number by the number of protons the element contains, for that number is never changing, it's what determines the element.
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Glenn Seaborg synthesised transuranic elements. Which were the elements after uranium in the periodic table.
