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| Dmitri Mendeleev chemist,physicist |
Died : 2 February 1907 (aged 72) Saint Petersburg, Russian Empire
Nationality : Russian
Alma mater : Saint Petersburg University
Known for : Formulating the Periodic table of chemical elements
Awards
- Davy Medal (1882)
- ForMemRS (1892)
Scientific career
- Fields
- Chemistry
- Physics
Mendeleev was born in the village of Verkhnie Aremzyani, near Tobolsk in Siberia, to Ivan Pavlovich Mendeleev (1783–1847) and Maria Dmitrievna Mendeleeva (née Kornilieva) (1793–1850).His paternal grandfather Pavel Maximovich Sokolov was a Russian Orthodox priest from the Tver region.Ivan, along with his brothers and sisters, obtained new family names while attending the theological seminary. He worked as a school principal and a teacher of fine arts, politics and philosophy at the Tambov and Saratov gymnasiums.
In 1849, his mother took Mendeleev across Russia from Siberia to Moscow with the aim of getting Mendeleev a higher education. The university in Moscow did not accept him. The mother and son continued to Saint Petersburg to the father’s alma mater. The now poor Mendeleev family relocated to Saint Petersburg, where he entered the Main Pedagogical Institute in 1850. After graduation, he contracted tuberculosis, causing him to move to the Crimean Peninsula on the northern coast of the Black Sea in 1855. While there, he became a science master of the Simferopol gymnasium №1. In 1857, he returned to Saint Petersburg with fully restored health.Between 1859 and 1861, he worked on the capillarity of liquids and the workings of the spectroscope in Heidelberg. Later in 1861, he published a textbook named Organic Chemistry.This won him the Demidov Prize of the Petersburg Academy of Sciences.
Cl 35.5 K 39 Ca 40
Br 80 Rb 85 Sr 88
I 127 Cs 133 Ba 137
By adding additional elements following this pattern, Mendeleev developed his extended version of the periodic table.[40][41] On 6 March 1869, he made a formal presentation to the Russian Chemical Society, titled The Dependence between the Properties of the Atomic Weights of the Elements, which described elements according to both atomic weight and valence.
Did You Know
In 1865 Dmitri Mendeleev became Doctor of Science for his dissertation "On the Combinations of Water with Alcohol"
Quotes
"The most all penetrating spirit before which will open the possibility of tilting not tables, but planets, is the spirit of free human inquiry. Believe only in that."
“Work, look for peace and calm in work: you will find it nowhere else.”
“The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties.”
“No law of nature, however general, has been established all at once; its recognition has always been preceded by many presentiments.”
“We must expect the discovery of many as yet unknown elements-for example, elements analogous to aluminum and silicon- whose atomic weight would be between 65 and 75.”
"There exists everywhere a medium in things, determined by equilibrium."
"I want you to have this feeling too - it is my moral responsibility to help you achieve this inner freedom."
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