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He grouped the elements based on their properties into gases, non-metals, metals and earths
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He recognised triads of elements with chemically similar properties
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At a conference, progress was made towards the discovery of the modern periodic table.
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He plotted the atomic weights of the elements on the outside of a cylinder.
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1864-1870
He produced several periodic tables. His first table included only 28 elements and organised them in order of valency. in 1868 he made another table that included transition metals. This tabel looked very similar to Mendeleev's table because of how it was arranged; in vertical lines. It was only published a year after Mendeleev's table even though it was made beofre Mendeleev's table. -
He noticed that there were similarituies between elements with atomic weights that differed by seven.
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He created the pattern we now use for our periodci tables that organised elements by their atomic weight, and then grouped elements with similar properties together. He even predicted other elements that hadnt been discovered yet, named them and even figured out what their atomic weights would be, sometimes down to a decimal point.
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He found a way to actually measure the atomic number. His work helped other scientists determine the structure of the atom.
