A chemical is any substance made up of matter that has a specific composition and properties. It can be an element, like oxygen, or a compound, like water, formed when two or more elements combine.

1. Water (H₂O): The most common solvent, essential for all known forms of life.


2. Sodium Chloride (NaCl): Table salt, used in cooking and food preservation.


3. Sulfuric Acid (H₂SO₄): Used in manufacturing fertilizers, batteries, and in various industrial processes.


4. Ammonia (NH₃): Used in fertilizers, cleaning products, and refrigeration.


5. Glucose (C₆H₁₂O₆): A simple sugar, important energy source in living organisms.


6. Acetone (C₃H₆O): A solvent used in nail polish remover and industrial applications.


7. Methane (CH₄): A simple hydrocarbon, used as a fuel and a starting material for chemical synthesis.