Question

8. Перепишите и переведите текст контрольной работы № 3. Задайте 5 общих и 5 специальных вопросов к тексту. D.I. MENDELEYEV – PRIDE OF RUSSIAN SCIENCE D.I. Mendeleyev was born in Tobolsk in 1834. In 1850 at the age of 16 he entered the Pedagogical Institute in St. Petersburg to study Chemistry. Five years later he graduated from it with a gold medal and was invited to lecture on theoretical and organic Chemistry at St. Petersburg University. To continue his studies and research Mendeleev was sent to Germany in 1859. While living abroad he made a number of important investigations. The year 1868 was the beginning of his highly important work “Fundamentals of Chemistry”. Working at this subjects Mendeleev analysed an enormous amount of literature, made many experiments and calculations. This tremendous work resulted in the Table of Elements consisting of vertical groups and horizontal periods. He was the first to suggest a system of classification in which the elements are arranged in the in the order of increasing atomic weights. The main idea of the Periodic System is the idea of periodic repetition of properties with the increase of the atomic weights. Arranging all the existing elements in the Table Mendeleev had to overcome great difficulties, as a considerable number of elements were unknown at that time and the atomic weights of 9 elements (out of 63) were wrongly determined. Thanks to his investigations Mendeleev was able to predict not only the existance of a few unknown elements but their properties as well. He died in 1907 at the age of 73.

Answer 1

1.Where Mendeleyev was born?
2.Where Mendeleyev was sent in 1859?
3.What year was the beginning of his important work?
4.What the main idea of Periodic System?
5.When he die?

Answer 2

D.I. Mendeleyev – Pride of Russian Science

Dmitri Ivanovich Mendeleyev was born in Tobolsk in 1834. At the age of 16, in 1850, he entered the Pedagogical Institute in St. Petersburg to study Chemistry. After five years, he graduated with a gold medal and was invited to lecture on theoretical and organic Chemistry at St. Petersburg University. In 1859, Mendeleev was sent to Germany to continue his studies and research. During his time abroad, he conducted several important investigations.

In 1868, Mendeleev began his highly important work called "Fundamentals of Chemistry." He analyzed a vast amount of literature, conducted numerous experiments, and made calculations. This extensive work led to the creation of the Periodic Table of Elements, which consists of vertical groups and horizontal periods. Mendeleev was the first to propose a system of classification in which the elements are arranged in order of increasing atomic weights. The main idea of the Periodic System is the periodic repetition of properties with the increase of atomic weights.

Despite facing significant difficulties, such as the unknown nature of many elements at that time and the incorrect determination of atomic weights for nine elements out of 63, Mendeleev successfully arranged all the existing elements in the Table. Moreover, his investigations allowed him to predict the existence and properties of several unknown elements.

Dmitri Ivanovich Mendeleyev passed away in 1907 at the age of 73.

General Questions:

1. Where was D.I. Mendeleyev born? 2. What did Mendeleyev study at the Pedagogical Institute in St. Petersburg? 3. Where was Mendeleyev invited to lecture on Chemistry? 4. When was Mendeleyev sent to Germany? 5. What was the main idea of the Periodic System proposed by Mendeleyev?

Specialized Questions:

1. What was the title of Mendeleyev's highly important work? 2. What did Mendeleyev analyze to create the Periodic Table of Elements? 3. What did Mendeleyev propose in terms of the arrangement of elements? 4. What difficulties did Mendeleyev face while creating the Table? 5. What did Mendeleyev's investigations allow him to predict?