Translate the text. Use a dictionary if necessary. To each sentence put different type of question in Present Continuous.

The students of the Technical University were carrying out an experiment with a multimeter in the lab last week. They were checking a mains socket in the wall and they were following all the safety instructions. Paul was using two probes that time. While he was inserting them into two terminals of the socket, his groupmate Alex was turning the function selector switch to the VAC (voltage alternating current) range. The needle was indicating the pressure of electricity, i.e. the voltage in the mains. It was 220 volts. Next time they are planning to measure the current in a table lamp.

10. Read and Translate word-combinations starting from the first component:

1.

electronic
construction
mathematical	equipment
production
testing

2.

alternating
periodic
physical	quantity (величина)
pulsating
vector

3.

integrated
	quantity (количество)
large

4.

mathematical
	table
periodical

5.

crystal
	lattice
point (точечная)

6.

valence
	electrons
free

11. Match the following word-combinations with their translation:

a) special equipment	1) внешняя оболочка
b) a solid piece of pure silicon	2) ковалентные связи
c) crystal lattice	3) кристаллическая решётка
d) covalent bonds	4) твёрдый кусок чистого кремния
e) outer shell	5) внутренняя оболочка
f) inner shell	6) специальное оборудование

12. Match the following sentences with their translation:

a) Elements with similar properties are placedinthe same vertical column.	1) Элементы,помещённые в той же самой вертикальной колонке, имеют схожие свойства.
b) Mendeleyev placed elements with similar properties in the same vertical column.	2) Элементы с похожими свойствамипомещены в той же самой вертикальной колонке.
c) Elements placed in the same vertical column have similar properties.	3) Менделеев поместил элементы с похожими свойствами в одной и той же вертикальной колонке.

Choose as many words as you can of Ex.1 and form sensible sentences.

For example:

• Special noise absorption materials are even mixed with road asphalt and coat electric power lines here.

Specialist Reading.

14. Read the text ‘Covalent Bonds’ only once. How much can you remember? Answer these questions without additional reading.

1. What do you know about the Mendeleev Periodic Table of Elements?

2. How many elements are known to science today?

3. Do you know that some elements do not exist at all in nature?

4. How do you define valence electrons?

5. What can you say about atoms in a solid piece of pure silicon?

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