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Wrote the first extensive list of elements containing 33 elements
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Developed Triads, groups of three elemts with similar properties.
Lithium, sodium and potassium.
Calcium, strontium and barium
Chlorine, bromine and iodine -
Compiled a Periodic Table of 56 elemts based on properties like molar volume
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Produced a table based on atmoic weight but arranged periodically
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Synthesised all elements after uranium
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