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Text j. Problems of chemistry

The chemistry involves a systematic study of the sub­stances of the universe, of their properties and their reactions with each other to form new substances with different pro­perties and of the conditions governing those reactions.

Were this all, then the chemistry would be little more than a massive catalogue of facts and a collection of tech­niques to be discovered.

But chemistry is also said to be concerned with the clas­sification of data it has acquired and with a series of precise generalizations called laws.

Chemistry is not concerned only with the discovery of laws. Its aim is to find the simplest explanation of these laws to invent a theory which makes clear the relationship between one law and another.

A number of theories are encountered in chemistry the atomic theory, the kinetic theory, the ionic theory and the electronic theory of valency.

It is an important feature of scientific theories that they should provide an explanation of facts already known, but they should also lead to a further advance in our knowledge.

Unit II. Famous chemists and their achievements

I. Language

Exercise 1. Read and memorize the following words :

Outstanding chemist видатний хімік

To gain fame здобути славу

Recognition визнання

Discovery відкриття

To suffer страждати, відчувати (біль)

To be mistaken помилятися

To refer to посилатися на, звертатися до

Atomic number атомна кількість

To mean значити, мати на увазі

The opportunity зручний випадок, можливість

To discover виявляти

To lead вести

Property властивість

Despare розпач

To be overwhelmed бути усеперемагаючим

A prominent botanist видатний ботанік

Connection зв’язок

A major goal головна мета

Paints фарби

oil нафта

glass скло

inventor винахідник

destructive power деструктивна сила

weapon зброя

atomic nucleus атомне ядро

arrangеment розташування

Exercise 2 .Guess the meaning of the following international words .

phase, element, periodic, group, period, form, table, atomic, function, to formulate, triumph, professor, revolution, system, cement, realism, nation.

Exercise 3. Combine two words to form a word-combination and translate them.

outstanding, chemical, atomic, destructive, periodic, element, scientific, chemist, nucleus, power, table, discovery .

Exercise 4 . Define the part of speech of the words below paying attention their suffixes .

recognition , accidental , discovery , arrangement , emphasize , weighty , evidently , teacher , scientifically , limitless , realism , different , shrewdness , ignorance , famous , consumption.