1. In chemistry class studied various substances and their interactions.
2. Chemistry is divided into 2 General parts - organic and inorganic.
3. Organic chemistry studies fats, proteins, and carbohydrates.
4. Biochemistry — the science of the chemical composition of living cells and organisms, as well as the underlying chemical processes.
5. Dmitry Mendeleev Russian scientist who created the periodic table of elements.
6. the properties of chemical elements depend on the atomic number.
7. A chemical reaction is the interaction of two or more substances.
8. It depends on the physical state of body: solid body, liquid and gas.
Model: It's raining hard. We can't go out. If it were not raining so hard, we could go
out.
I have no dictionary. I shan't finish the translation today. If I had a dictionary, I would
finish the translation today.
The goal-keeper was hurt early in the game. The team lost. If the goal-keeper had
not been hurt early in the game, the team would not have lost.
1. If we liked cheese, we would buy it.
2. If he hadn't lost his temper, he wouldn't have said things he did not really mean.
3. If I knew your cousin, I could meet her at the station.
