Dmitri Ivanovich Mendeleev was born on February 7, 1834. He was the youngest of 14 children and everyone's favorite. Mendeleev had as many opportunities as his mother could afford. When he was young, he spent many hours in the glassworks his mother operated, learning from the chemist, who influenced him, the concepts behind glassmaking and from the glassblower about the art of making glass. glass. Another great influence in her life was Bessargin, her sister's husband. Bessargin took care of teaching Dmitri the science of the time. Mendeleev's early years were guided by these people and so he was raised with three key ideas: Bessargin's "Everything in this world is science", the glassblower's "Everything in the world is art" and "Everything in the world is art". world is art.” love”, from his mother. Mendeleev knew from a very young age that he wanted to study science and saw little need to study subjects such as Latin and history. He considered them a waste of time. Later he passed his gymnasium exams and prepared to enter university. He was allowed to take the entrance exams, which he passed, not with honors, but well enough to be admitted to the science teacher training program on a full scholarship. He entered the university in the fall of 1850. He threw himself directly into his work in St. Petersburg. His studies progressed quickly until the third year. When he was struck by an illness which forced him to stay in bed for a year. In Mendeleev's time, the atom was considered the most fundamental particle of matter. What Mendeleev and other chemists determined was the atomic weight of each element. What was the weight of its atoms compared to a hydrogen atom. Mendeleev said: "I started looking around and writing down the elements...... middle of paper...... and I wrote a formula similar to Gay-Lussac's law on the consistency of gas expansion. In 1861 he anticipated Thomas Andrews's conception of the critical temperature of gases by defining the absolute boiling point of a substance as the temperature at which the cohesion and vaporization level become zero and the liquid transforms into steam, whatever the pressure and volume. Mendeleev accomplished a lot. He received numerous awards from various organizations, including the Davy Medal of the Royal Society of England in 1882, the Copley Medal, the Society's highest honor, in 1905, and honorary degrees from universities around the world. After his resignation from the University of Saint Petersburg, the Russian government in 1893 appointed him director of the Bureau of Weights and Measures. Mendeleev remained a popular social figure until his death..