/>Lets read the text and guess who this text is about and then analyze the statements under it.
(1834-1907)
is a famous Russian chemist. He is best known for his development of the periodic table of the properties of the chemical elements.
Mendeleyev was born in 1834 in Tobolsk, Siberia. He studied chemistry at the University of St. Petersburg, and in 1859 he was sent to study at the University of Heidelberg. returned to St. Petersburg and became Professor of Chemistry at the Technical Institute In 1863. He became Professor of General Chemistry at the University of St. Petersburg in 1866. was a well-known teacher, and because there was no good text book in chemistry at that time, he wrote the two-volume Principles of Chemistry, which became a classic textbook in chemistry. In this book tried to classify the elements according to their chemical properties. In 1869 he published his first version of his periodic table of elements. In 1871 he published an improved version of the periodic table, in which he left gaps for elements that were not known at that time. His table and theories were proved later when three predicted elements: gallium, germanium, scandium were discovered.
investigated the chemical theory of solution.
He found that the best proportion of alcohol and water in vodka is 40o. He also investigated the thermal expansion of liquids and the nature of petroleum. He died in 1907.
Words:
To classify – классифицировать
two - volume – в двух томах
gap – пробел
gallium – галлий
germanium – германий
scandium – скандий
solution – раствор
liquid – жидкость
petroleum – нефть
Key:
This text is about Mendeleyev.
Look at the statements and say if they are true or false.
D. I. Mendeley
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