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