9. Open the brackets translating the Russian words into English:

1. (При помощи) of a new cyclotron it became possible to open up the nucleus of any atom. 2. The new device was created (вместо) an old one. 3. The element produced (таким образом) was named "technetium". 4. The element behaved (подобно) an alkali-metal. 5. Radioactive neptunium (привел) to another element – number 94. 6. The isolation of element number 102 (имело место) in 1963. 7. (He удивительно) that many new discoveries have taken place recently. 8. (Наконец) they succeeded in creating a new type of ma­chine. 9. This element was named (в честь) of this famous scientist. 10. It was (особенно) difficult to distinguish this substance. 11. It was (практически) impossible to create a new type of machine at our plant.

10. Explain the difference between:

hard – hardly high – highly great - greatly

near – nearly late – lately ready – readily

11. Find the sentences where the word "hard" is translated as "упорно", "настойчиво":

1. The research-workers of our Institute had to carry on hard work to find out all the missing properties of this sub­stance. 2. He has to work hard this term as he missed many lectures. 3. It was hardly possible to distinguish the properties of this substance at first sight, therefore a powerful microscope had to be used. 4. They worked hard and their hard work resulted in new interesting discoveries. 5. If you studied hard, you would hardly fail at the examination. 6. She will hardly come as she is very busy. 7. The molecules of even the hardest steels can be separated by enormous distances compared to the size of the molecules.

12. Translate the text using a dictionary:

Element 101 Mendelevium in the form of the isotope ²⁵⁶Md, was the first to be synthesized in 1955. In recent years several additional isotopes of Mendelevium have been pre­pared, the most important one being ²⁵⁸Md which has the surprisingly long half-life of two months. It was produced in a large quantity – 10,000 atoms by the bombardment of an isotope of Einsteinium with ions of helium.

The isotope ²⁵⁶Md having a half-life of 77 minutes has been used by chemists to elucidate some of the chemical properties of the element in aqueous solution.

The isotope ²⁵⁴102 was identified through the fact that its daughter, an isotope of fermium, ²⁵⁰Fm, formed by alpha-particle decay was observed and chemically identified.

The half-life of ²⁵⁴102 was stated to be about three seconds. Later work showed that this short-lived activity was due to another isotope.

In 1965 Dubna workers found a longer-lived isotope – lawrencium ²⁵⁶Lr, its half-life being 35 seconds.

13. Read about ordinary water and transform the word given in bold at the end of each line into a suitable form that fits the space in the same line.

In _1_, the elements fall into two main categories: metals and non-metals. The metals are those which have the bright _2_ and other characteristics which are usually _3_ with such substances as iron, _4_, zinc and tin, while the non-met­als are those substances which do not have _5_ of metals. By far the greater number of elements are _6_ to be metals, since the transition elements are all metals. The elements could be still further _7_ into five groups, three of which being metallic and two of which being _8_.

generally lustrous associate silvery characteristic know divide non-metal

UNIT VI MERCURY

Grammar: The Subjective Infinitive Construction

Review of the “- ing”- forms.

Text: Mercury in the Environment.

1. Translate and memorize the following words.

tarnish	tissue	injurious
threat	algae	substantial
disinfect	sublimate	sufficientl
concern	luster	tight
solve	solute	soluble