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Dobreiner - Triads
In 1829, Dobreiner found that when he looked he saw groups of three elements that had very similar or practically the same properties. Called a triad, Dobreiner realized that the atomic mass for the middle element was the average of the bigger and smaller element. -
John Newlands - Octaves
In 1865, John Newlands lived in a time where there was no noble gases that were stable. During his research, he found that in elements that had atomic weights differing by seventh eye was multiple similarities. New lands is credited with the law of octaves for noble gases -
Dmitri Mendeleev - Periodic Tables
Dmitri Mendeleev is known for creating the first accurate, well known periodic table of the elements. It was published in 1869 and was made up of elements organized by increasing atomic weight, but still being adjacent to elements with similar properties. His table also helped to predict the future, telling other elements that will have these certain properties based on his table. He was correct. -
Lothar Meyer - Periodic Tables
Lothar Meyer did his research at the same time and the same thing as Mendeleev, though neither knew about the other's work. He realized patterns in atomic weight and the patterns in the certain "unique" properties of elements. He also made a table of the elements organized by atomic weight arranged in "families" in 1868. It was similar to Mendeleev's, but the table was not published until 1870. -
John William Strutt - Noble Gases
Strutt was a Physicist who went by the name of Lord Rayleigh. Rayleigh together with William Ramsey discovered the first noble gas, Argon in 1895. Argon was named from the Greek word "Argos" which means lazy (because argon was unreactive). He researched the fact that Argon did not fit in any part of the periodic table and eventually Ramsey found a place for it. -
William Ramsey - Noble Gases
Ramsey helped Rayleigh in the discovery of Argon. He removed oxygen, nitrogen, water and carbon dioxide from air and got an element 19 times heavier than hydrogen that was very unreactive. In 1898 decided to put Argon in the same family as Helium, which helped predict the future chemical properties of neon and other noble gases. -
Henry Moseley - Periodic Tables
Henry Moseley is known with figuring out the best way to construct the periodic table, a way to measure the atomic number in an element. In 1913 he shot X-rays at elements, using the deflected wavelength to find their frequencies, and discovered a steady increase, making an accurate form of measurement. -
Glenn Seaborg - Lactinide and Actinide Series
Glenn Seaborg is best known for finding the elements 94 to102, called transuranium elements. In 1941 he found isotopes of a fissionable element 239, which he named plutonium. As he developed his research more, he found what is now the Actinide and Lanthanide series and multiple other transuranium elements.
