Dmitri Mendeleev

Dmitri Ivanovich Mendeleyev ( ) ( in Tobolsk – in Saint Petersburg), was a Russian chemist. He is renowned for being one of the two scientists who created the first version of the periodic table of elements. Unlike other contributors to the table, Mendeleyev managed to predict the properties of elements yet to be discovered. In several cases he even ventured to question the accuracy of the accepted atomic weights, arguing that they did not correspond to those predicted by the Periodic Law, and here too subsequent research proved him correct.

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Tobolsk: Tobolsk (?????????; Tatar: Tub?l) is a historic capital of Siberia, now an ordinary town in Tyumen Oblast of Russia. It is located at the confluence of rivers Tobol and Irtysh. In 2001, the population was about 95,000....

Russia: The Russian Federation (, transliteration: Rossiyskaya Federatsiya or Rossijskaja Federacija), or Russia (Russian: ???????, transliteration: Rossiya or Rossija), is a country that stretches over a vast expanse of Europe and Asia. With an area of 17,075,400 km? (6,595,600 mi?), it is the largest coun...

Chemist: A chemist is a scientist trained in the science of chemistry. Chemists may specialize in any number of subdisciplines of chemistry. In Commonwealth English, chemist may also refer to a dispensing chemist,a pharmacist, or a general retailer of chemicals (usually for medicinal purposes)....