Dmitri Ivanovich Mendeleev was a Russian scientist. Born on 8th February 1832, he is known for formulating the Periodic Law; the periodic table of elements, and using the table to correct the properties of some already discovered elements.He was born in the village of Verkhnie Aremzyani, near Tobolsk in Siberia. Raised as an orthodox Christian, Dmitri’s mother used to encourage him to search divine and scientific truths. He later went on to inform his family that he has departed from the Church to embrace deism. Dmitri’s father was a teacher of fine arts, politics, and philosophy however due an unfortunate turn of events, his father lost his eyesight and had to eventually stop teaching. His mother was forced to work, and she restarted her family’s abandoned glass factory to support the family. After the death of his father, Dmitri went on to attend the Gymnasium (a school providing advanced secondary education with strong emphasis on academic leaning) in Tobolsk. After which he moved across the country to pursue higher education in Moscow. However his application in university was rejected. The family continued to stay in St. Petersburg post that and in 1850 Dmitri enrolled at the Main Pedagogical Institute. He then went on to work on the capillarity of liquids between 1859-1861. In august 1861 he wrote his first book on the spectroscope. He then went on to teach as a professor at Saint Petersburg Technological Institute and Saint Petersburg State University in 1864 and 1865 respectively. In 1865 he completed his [dissertation******dissertation** ➤ (n) a treatise advancing a new point of view resulting from research; usually a requirement for an advanced academic degree …by **BeeDictionary.com**](http://www.beedictionary.com/definition/dissertation) on ‘The Combinations of Water with Alcohol’ and got his doctorate degree. By 1871 Dmitri has transformed Saint Petersburg into an internationally recognized center for chemistry research. He went to become an acclaimed scientist internationally, and was honored by scientific organization all over Europe including Davy Medal from the Royal Society of London. In 1890 he resigned from Saint Petersburg University and was elected as a Foreign Member of the Royal Society in 1892, and in 1893 he was appointed as the director of the Bureau of Weights. Dmitri investigated the composition of petroleum and helped find the first oil refinery in Russia. In 1905 he was elected as the member of the Royal Swedish Academy of Sciences. This led to the Nobel Committee for Chemistry recommending the Swedish Academy to award him the Nobel Prize in Chemistry the following year, i.e. 1906 for his discovery of the periodic system. The chemistry section of the Swedish Academy supported this recommendation. However due to the influence of Svante Arrhenius, who was fueled by a personal grudge, the award was given to Henri Moissian. In 1907, Dmitri died at the age of 72 in Saint Petersburg. The crater Mendeleev on the Moon, as well as the element number 101, the radioactive mendelevium, is named after him.