Scientist of the Month - Dmitri Mendeleev
By Ilana Taieb Hagerty / 8th grade
Dmitri Ivanovich Mendeleev ( 8 February 1834-2 February 1907 (aged 72) was a Russian chemist, physicst and inventor. He formulated the Periodic Law, created a farsighted version of the periodic table of elements, and used it to correct the properties of some already discovered elements & to predict the properties of eight elements yet to be discovered. Many of the predictions made in his periodic table (such as the properties of elements undiscovered at the time) were later proved correct by experiments.
Mendeleev was unaware of the different propositions for a table of elements that were created by John Newlands in the same era. Mendeleev's table started out as a nine-element table, that he filled in with the discovered elements later. Nine years after his breakthrough he officially presented his work "The Dependence between the Properties of the Atomic Weights of the Elements" to the Russian Chemical Society.
Mendeleev's original table