1. Find equivalents:

2. False or true? 

1. The Russian chemist Dmitry Mendeleyev is regarded as the founder of the periodic table of chemical elements.

2. He studied all the elements and discovered that they showed a certain order of properties when arranged in a regular repetition.

3. Mendeleyev’s experiments with agricultural production affected its efficiency.

4. The English chemist Antoine Lavoisier is considered to be the father of modern chemistry.

5. He studied gases, gunpower, and combustion.

6. The discovery of oxygen and hydrogen led him to describe elements and compounds later named after him.