1. Oxygen (O): Essential for respiration, combustion, and many industrial processes.

2. Nitrogen (N): Used in fertilizers, explosives, and as an inert gas for packaging.

3. Carbon (C): Found in fuels, plastics, graphite for pencils and lubricants, diamonds for jewelry and cutting tools.

4. Hydrogen (H): Used in fuel cells, rocket fuel, and as a reducing agent in chemical reactions.

5. Chlorine (Cl): Used in disinfectants, bleach, and for producing PVC plastic.

6. Fluorine (F): Found in toothpaste, refrigerants, and non-stick cookware.

7. Phosphorus (P): Used in fertilizers, matches, and fireworks.

8. Sulfur (S): Found in sulfuric acid, used in batteries, and in the vulcanization of rubber.

9. Silicon (Si): Used in computer chips, solar panels, and glass.

10. Bromine (Br): Used in flame retardants, pesticides, and photographic film.