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Laviosier
Lavoisier was a French chemist who discovered many things.
He demonstrated that there was an element called oxygen. He also showed that no mass is lost in a chemical reaction, as was believed at the time. This is the Law of Conservation of Mass and is one of the most important and basic laws of modern chemistry and physics. He invented a system of naming chemical compounds that were made up of multiple elements and of his system is still in use today. He named the element hydrogen. -
Döbereiner
Johann Wolfgang Döbereiner was a German chemist who was born in 1780 and died in 1849. He is best known for his work on the law of triads that he put forward in 1817. Each of Döbereiner's triads was a group of three elements. The appearance and reactions of the elements in each triad were similar to each other. -
Newlands
John Newlands was an English scientist born in 1837. He was the first scientist to propose a table of periodic elements in order of atomic mass. He continued the work of Döbereiner's work and used this idea of triads to arrange the elements is somewhat of a logical order according to their physical properties. He also proposed a law of octaves. -
Meyer
Julius Lothar Meyer was a German chemist who began his career as a science teacher in 1859. Meyer wrote a book illustrating the fundamental aspects of chemistry, called Die modernen Theorien der Chemie (or Modern Chemical Theory) in 1864. Meyer began working on a Periodic Table in 1868, and he released his research in 1870, one year after Mendeleev's Table was released. -
Mendeleev
Considered the 'father of the periodic table', Dimitri Mendeleev published a periodic table that allowed known elements to be grouped according to their properties. Mendeleev created cards for each of the 63 elements, noting their symbols, weights, and properties on each. When he arranged the cards in order of ascending atomic weight, grouping elements of similar properties together, the periodic table was formed. He also predicted other elements that were yet to be discovered. -
Seaborg
Glenn Seaborg was a Nobel Science Prize winning scientist for his contribution to the periodic table. At the time of his works, the periodic table had developed far, far from Mendeleev's original periodic table- but still lacked many elements which are found on the table today. He discovered two elements, Californium and more notably Plutonium.