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Antoine Lavoisier
Wrote the first list of elements containing 33 elememts. He made it so you can tell the different between metals and non-metals. Later on some of Antoine Lavoister elements were shown to be compounds and mixtures. -
Alexandre-Emile Béguyer de Chancourtois
Listed the elements wraped around a cylinder like a spiral. The three elements with similar properties came together down the spiral on the cylinder. The model was called ‘telluric screw’. -
John newlands
John Newlands were born on the 26th of Novemebr 1837.John discovered that elements were arranged in order of atomic weight. He noticed that there was a periodic similarity every 8 elements. He created his law and called it ‘law of octaves’. -
Lothar Meyer
Lothar Meyer was born on the 19th of August 1830. Lothar Meyer created a periodic table of 56 elements. The elements were based on a regular repeating pattern of physical properties such as molar volume. The elements were arranged in order of increasing atomic weights. -
Dmitri Mendeleev
Dmitri Mendeleev was a Russian chemist that created a persiodic table based on the atomic weight. He arranged the elements with simialer properties underneath each other and left gaps for elements that have not been discovered yet. -
William Ramsay
William Ramsay discovered a new group in the periodic table. He discoverd that the noble gases belonged in the peroidoc table. -
Henry Moseley
Henry Moseley realised that the elements were arranged in the increasing atomic number then in atomic wieght. He realised if they were increaing in atomic number they would work better with the periodic table. Henry Moseley came up with atomic number of each number and put them in increasing order. -
Glenn Seaborg
Glenn Seaborg created a new part of the periodic table and called it 'actinides'. The new part of the periodic table was artificially made by a heavy mass element such as neptunium.
