English for chemists

Section Ш
Ex. 1. Think of thesituations when the following expressions may be used:
I'd like to ...; what about you; the same to you
Examples: 1. I'd like to go to the cinema today, and what about you? 2.1 wish you the best of everything.— The same to you.
Ex. 2. Translate the following into English. Let your fellowvstudents respond to your statements or questions. Use the expressions from exercise 1.
1. Я еще не знаю расписание на следующую неделю, а ты? 2. Мне хотелось бы сегодня поработать, давай встретимся завтра. 3. Завтра выходной, желаю тебе хорошо отдохнуть. 4. Я никогда не знал, что в молоке есть кремний, а ты? 5. Он хотел бы сдать экзамен завтра, б. Петров сдал уже все экзамены, а ты? 7. Лекции профессора Нико­ лаева очень интересны, я хотел бы записывать их полностью, но я пишу медленно. 8. Мне хотелось бы понять, почему кварц такой твер­ дый. 9. Желаю тебе хорошо сдать все экзамены.
Ex. 3. Make up sentences or short stories with the following words:
1) dioxide, nature, three, crystal, silicon, occur, different, form; 2) be, widespread, silicon, quartz, most, mineral; 3) quartz, structure, hardness, mineral, account for; 4) play, important, silicon, vital, role, animal, men, proccss; 5) be present, silicon, appreciable, food-staff, amount

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Ex. 4. Give detailed answers to the following questions:
1. In what form docs silicon occur in nature? 2. What is the structure of quartz; what arc the properties of this mineral? 3. What is the structure of silicic acid; what arc the properties of this acid? 4. In what living processes in animals or men docs silicon take part?
Ex. 5. Discuss the following topics:

1. 
   An Abundance of Silicon.
   

2. 
   The Structure of Si02 Molecule.
   
3. 
   Properties and Structure of Quartz, Cristobalitc and Tridymitc.
   
4. 
   The Role of Silicon in Living Processes.
   

DO YOU KNOW THAT...

Although the compounds of silicon have been used for many centuries, the element was prepared only at the beginning of the 19th ccntuiy. At present, there arc several methods of obtaining silicon. One of them is to heat silicon dioxide with magnesium:
SiO: + 2Mg = Si + 2MgO.
One way of preparing silicon commercially is by reducing SiOj with carbon in an electric fumacc.