About Dmitri Mendeleev:
Dmitri Ivanovich Mendeleev was a Russian chemist and inventor. He formulated the Periodic Law, created his own version of the periodic table of elements, and used it to correct the properties of some already discovered elements and also to predict the properties of eight elements yet to be discovered.
Certain characteristic properties of elements can be foretold from their atomic weights.
Dmitri Mendeleev