-
Hennig Brand
He discovered phosphorous in 1669 by boiling urine trying to turn it into gold. -
John Dalton
John Dalton stated that elements are made up of extremely small particles called atoms. -
Antoine Lanvoisier
Antoine-Laurent de Lavoisier was a French man prominent in the histories of chemistry and biology. He named oxygen and hydrogen. He put together the first list of elements which included 33 elements and had metals and non-metals. He was also the first to say that sulphur was an element not a compound. He discovered that matter may change its form or shape but its mass will always be the same. -
Jacob Berzelius
Jakcob Berzelius created a table of atomic weights & introduced letters to symbolize elements. -
John Newlands
he arranged the known elements into atomic weight and watched certain similarities between elements. He published a book called "law of octaves" and said that every eight elements had something in common. -
Dmitri Mendeleev
Dmitri Mendeleev produced a table based on atomic weights but arranged with elements with similar properties under each other. His Periodic Table included the 66 known elements at the time in organized by atomic weight. he left gaps for more elements to be discovered, he predicted some of thir atomic masses. -
Lothar Meyer
he produced a table of 56 elements ordered by atomic weight. -
william ramsay
He discovered the noble gases. he was awarded a nobel prize in 1904 -
Ernest Rutherford
Ernst Rutherford discovers a proton.
This lead to the understanding of that elements should be ordered in the periodic table by atomic number, not atomic weight.
