Dmitri Mendeleev is a great Russian scientist of the 19th century.
He succeeded as a great chemist who create the periodic classification of the elements.
Dmitri Mendeleev was born in Tobolsk in 1834. At school, Dmitri did research in mathematics, physics and geography but was not good at languages. In 1855, he graduated from the Pedagogical Institute in St Petersburg with a gold medal for his achievement. In 1856, he received a degree in chemistry.
Dmitri Mendeleev's contribution to the world's science was enormous. He was the first to recognise the dependence of the qualities of the elements on their atomic weight. He forecast that the gaps in the table of elements would be filled in by elements which were not discovered yet. Dmitri Mendeleev was greatly honoured as a member of academies in many countries. Element No. 101 is called Mendelevium in his honour.