Санкт-петербургского государственного университета высшее профессиональное образование т. А. Степанова, И. Ю. Ступина
particles make ... the nucleus ... the atom
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particles make ... the nucleus ... the atom. Ex. 8. Translate the sentences into Russian paying attention to diflcrcnt functions of the verb do. 1. Do it as quickly as you can. 2. Do you know when the periodic law was stated? 3 . 1 can’t do it now, 1 must be going. 4. The alchemists did improve techniques during their search o f the philosopher’s stone and an elixir of life. 5. They do synthesize new materials in their laboratory. 6. Scientists did not understand organic chcmistry before the synthesis o f urea. 7. He will have done it by S o ’clock. Ex. 9. Translate the sentences into Russian. a) 1. In the period 350-1500 A. D. alchemists devoted their efforts to a search for the philosopher’s stone. 2. Our understanding o f atomic energy levels is based on modem advances in chcmistry. 3. Reliable physical and chemical measurements stimulated the determination of accurate atomic weight. 4. Until the discovery of the subatomic particles, the structure of atoms was not fully understood. 5. These laws (the laws of the Conservation o f Mass and Definite Proportions) were an important stimulation for the 19th-century chemistry. 6. The first period in the development of chcmistry is the ancient period (until 350 A. D.). 7. There arc five periods in the history o f chcmistry. 8. Mendeleyev’s law of periodicity of elements has withstood the onslaught of the discovery of the subatomic particles. 9. Five “elements” (earth, air, fire, water and the quintessence) were considered by the ancients as the building blocks of matter. b) 1. Is your text difficult? — It is easy. 2. Was the philosopher’s stone found? — No, it was not. 3. What is this? — It is a text-book. 4. Whose book is it? — It is Nick’s book. 5. It is a very interesting phenomenon. 6. It is winter. 7. It is snowing now. 8. It was early morning when we came to the laboratory. 9. It is a long way from our hostel to die university. 10. It is believed that Wohler synthesized urea in 1828. 11. During the phlogiston period it was considered that some hypothetical matter was required for combustion and calcination. 12. It is necessary to know the periodicity in the history of chemistry. 13. It is never too late to leam. 14. It is chcmistry that is my favourite subjcct. 15. It was Lomonosov who was the founder of Russian physico-chemical scicncc. 16. It was early in the 19th century that Dalton founded his atomic theory. 17. It was after urea was synthesized that the development of organic chcmistry was stimulated. 18. It was not the alchemical period which was the shortest in the history of chcmistry. 19. It was not until qualitative and quantitative analysis had identified enough pure substances that inorganic chcmistry grew in scope. 20. It was not until 1808 that Gay-Lussac’s law was postulated. 21. Theirs was a very important discovery. 22. Ours is a most essential scicncc. 23. These are the latest 95 journals. 24. Accurate measurements began with the laws of Boyle, Charles, Gay-Lussac and Dalton. These stimulated the efforts to determine accurate atomic weights. 25. How can one prepare urea? 26. One can express the idea for combination in valence. 27. Why docs one call Mendeleyev’s law the periodic law? 28. One must clearly understand the idea of chemical transformation. 29. One should be accurate in laboratory measurements. Ex. 10. Translate the scntcnccs into English. 1. В истории развития химии есть несколько периодов. 2. Еще в Древней Греции был разработан философский подход к изучению материи. 3. Нужно помнить, что главной целью периода алхимии был поиск философского камня. 4. Считали, что именно философский камень превращает обычные металлы в золото. 5. Только тоща, когда были разработаны методы количественного и качественного анали за, стало возможно получить достаточное количество чистых веществ. 6. Увеличение веса металлов при прокаливании привело впоследствии к открытию газов. 7. Что такое качественный анализ? S. До 1928 года органическую химию мало понимали. 9. Многие ученые создавали свои модели строения атомов. Ex. 11. Answer the following questions: 1. How many periods arc there in the history of chcmistry? 2. What are these periods? 3. What do you know about the ancient period? 4. What were the principal goals o f the alchemical period? 5. What was the period o f iatrochemistry devoted to? 6. Why is the period between 1650 and 1774 callcd .the phlogiston period? 7. When docs modem chcmistry begin? 8. What stimulated the development of chcmistry in the 19th century? 9. What investigations led to the discovery of the Periodic Law? жүктеу/скачать 5,96 Mb. Достарыңызбен бөлісу:
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