Aristotle ~330 BC - Theory of 4 elements: earth, air, fire & water., Lavoisier 1770-1789  - Wrote a list of elements. Distinguished between metals and non-metals., Berzelius 1828 - Introduced letters to symbolise elements., Döbereiner 1829 - Developed 'triads', groups of 3 elements with similar properties., Newlands 1864 - Arranged the known elements (>60) in order of atomic weight., Mendeleev 1869 - Produced a table based on atomic weights but arranged 'periodically' with elements with similar properties under each other., Ramsay 1894 - Discovered the Noble Gases, Seaborg 1940 - Synthesised transuranic elements (the elements after uranium in the periodic table).,

Development of the Periodic Table

Leaderboard

Visual style

Options

Switch template

Continue editing: ?