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Hennig Brand
Although elements such as gold, silver, tin, copper, lead and mercury have been known from the start the first scientific discovery of an element occurred in 1649 when Hennig Brand discovered phosphorous. -
Daltons Law
John Dalton proposed "Dalton's Law" describing the relationship between the components in a mixture of gases -
Johann Dobereiner
In 1817 Johann Dobereiner developed groups of 3 elements with similar properties called the law of triads -
Jakob Berzelius
Jakob Berzelius developed a table of atomic weights & introduced letters to symbolize elements -
A.E.Beguyer de Chancourtois
in 1862 french geologist A.E.Beguyer de Chancourtois attempts at making a periodic table by arrange the elements in rows -
John Newlands
John Newlands arranged the known elements in order of atomic weights & observed similarities between some elements -
Dmitri Mendeleev
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. -
William Ramsay
William Ramsay discovered the Noble Gases