Exercise 10. Finish up the sentences

Exercise 9. Find the sentences in the text about.

Exercise 8. True or False statements.

Exercise 7. Make up sentences using the table.

1. Measurements 2. The fundamental unit of time 3. The fundamental unit of length 4.The basic unit of mass

is are

a……. one second. b……..the basis of all scientific work. c………the kilogram. d…….. one metre in the metric system.

1. The students of the pharmaceutical department usually have practical classes in Chemistry in chemical laboratory.

2. The chemical laboratory consists of several rooms: a room for storing the necessary substances and a room for recording the obtained findings.

3. Special glassware includes test-tubes, funnels, flasks of different shapes and sizes, retorts.

4. The windows of the weighing-room should overlook the North as the sun may prevent accurate weighing of the substances.

5. When students come to work to the laboratory they should put on fur coats and mittens.

6. The work in the chemical laboratory requires silence.

1. The rooms of a typical chemical laboratory.

2. The equipment of the chemical laboratory.

3. The laboratory glassware.

4. The reagents available in the chemical laboratory.

1. The students of the pharmaceutical department carry out….

2. The laboratory vessels and glassware are divided into three groups…..

3. The glassware for measuring includes…..

4. On the shelves and racks besides empty vessels there are many…..

5. The laboratory is equipped with….

6. Burettes are used for….

7. Glass-tubes, vessels, bottles, funnels should be …..

8. The windows of the weighing-room should ……

9. Alcohol is……

TEXT FOR WRITTEN TRANSLATION

Outstanding Russian Chemist D.I. Mendeleev

Dmitry Ivanovitch Mendeleyev, the great Russian scientist, the father of the Periodic Table of Elements, was born in Tobolsk in 1834 in the family of the director of the town Gymnasium. His grandfather was Pavel Maximovich Sokolov, a priest of the Russian Orthodox Church from the Tver region.

Mendeleev is thought to be the youngest of either 11, 13, 14 or 17 siblings; the exact number differs among sources. At the age of 13, after the passing of his father and the destruction of his mother's factory by fire, Mendeleev attended the Gymnasium in Tobolsk.

In 1849, the now poor Mendeleev family relocated to Saint Petersburg, where he entered the Main Pedagogical Institute in 1850. After graduation, tuberculosis caused 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. He returned with fully restored health to Saint Petersburg in 1857.

Between 1859 and 1861, he worked on the capillarity of liquids and the workings of the spectroscope in Heidelberg. In late August 1861 he wrote his first book on the spectroscope. Mendeleev became a professor at the Saint Petersburg Technological Institute and Saint Petersburg State University in 1864 and 1865, respectively. In 1865 he became Doctor of Science for his dissertation "On the Combinations of Water with Alcohol". He achieved tenure in 1867, and by 1871 had transformed Saint Petersburg into an internationally recognized center for chemistry research. His divorce and the surrounding controversy contributed to his failure to be His daughter from his second marriage, Lyubov, became the wife of the famous Russian poet Alexander Blok. His other children were son Vladimir (a sailor, he took part in the notable Eastern journey of Nicholas II) and daughter Olga, from his first marriage, and son Ivan and a pair of twins from Anna.

Though Mendeleev was widely honored by scientific organizations all over Europe, including the Copley Medal from the Royal Society of London, he resigned from Saint Petersburg University on 17 August 1890.

In 1893, he was appointed Director of the Bureau of Weights and Measures. It was in this role that he was directed to formulate new state standards for the production of vodka. As a result of his work, in 1894 new standards for vodka were introduced into Russian law and all vodka had to be produced at 40% alcohol by volume.

Mendeleev also investigated the composition of oil fields, and helped to found the first oil refinery in Russia.

In 1905, Mendeleev was elected a member of the Royal Swedish Academy of Sciences. The following year the Nobel Committee for Chemistry recommended to the Swedish Academy to award the Nobel Prize in Chemistry for 1906 to Mendeleev for his discovery of the periodic system. The Chemistry Section of the Swedish Academy supported this recommendation. The Academy was then supposed to approve the Committee choice as it has done in almost every case. Unexpectedly, at the full meeting of the Academy, a dissenting member of the Nobel Committee, Peter Klason, proposed the candidacy of Henri Moissan whom he favored. Svante Arrhenius, although not a member of the Nobel Committee for Chemistry, had a great deal of influence in the Academy and also pressed for the rejection of Mendeleev, arguing that the periodic system was too old to acknowledge its discovery in 1906. According to the contemporaries, Arrhenius was motivated by the grudge he held against Mendeleev for his critique of Arrhenius's dissociation theory. After heated arguments, the majority of the Academy voted for Moissan. The attempts to nominate Mendeleev in 1907 were again frustrated by the absolute opposition of Arrhenius.

In 1907, Mendeleev died at the age of 72 in Saint Petersburg from influenza. The crater Mendeleev on the Moon, as well as element number 101, the radioactive mendelevium, are named after him.

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