-
330
Aristotle
in 330BC Aristotle contributed with the 4 element- fire, earth, water and air theory -
400
Democritus and Leucippus
in 400BC the idea of a small particle, the atom was suggest by Democritus and Leucippus. -
Antoine Lavoisier
wrote a list of 33 elements and told metals and no-metals apart -
Jakob Berzelius
Jakob Berzelius symbolized elements by using letters. -
Johann Döbereiner
johann dobereiner was the developer of the groups containing 3 elements each the 'triads' known for their similar properties. -
john newlands
john newlands sorted the known elements into order of their atomic weights, he observed after. -
Lothar Meyer
lothar meyer makes a version of the periodic table containing 28 elements. -
Dmitri Ivanovich Mendeleev
Dmitri Ivanovich Mendeleev was the cretaor of the first version of the periodic table. he predicted some unknown elements exsisted and their propeties. -
William Ramsay
William Ramsay was the discoverer of the noble gases. -
Henry Moseley
henry moseley found out the atomic number for each of the elements and made changes to the periodic law. -
glenn seaborg
Synthesised the elements after uranium in the periodic table.