1.   About a hundred chemical compounds were continuously measured in the air, soil, and water throughout the whole structure.

2.   Atoms combine in specific ways to form chemical compounds.

3.   In nature, the elements form stable chemical compounds with each other, usually involving oxygen.

4.   Sulphur dioxide and carbon dioxide are two common chemical compounds.

5.   The criminals also sold a chemical compound they claimed the law mandated to make made wheelchair access ramps and floors slip resistant.

6.   The inert gases are so called because they do not readily form chemical compounds.

7.   The search for anti-cancer drugs, for example, usually involves trials of chemical compounds on human tumour cells.

8.   Their oxygen is kept not as a gas, but as a chemical compound.

9.   Vent water is enriched in reduced chemical compounds, especially hydrogen sulfide.

10.   The most widely used system of nomenclature of chemical compounds is that recommended by the International Union of Pure and Applied Chemistry.