Common Compounds:
* Water (H₂O): Two hydrogen atoms bonded to one oxygen atom.
* Salt (NaCl): One sodium atom bonded to one chlorine atom.
* Sugar (C₁₂H₂₂O₁₁): Many carbon, hydrogen, and oxygen atoms bonded together.
* Carbon dioxide (CO₂): One carbon atom bonded to two oxygen atoms.
* Ammonia (NH₃): One nitrogen atom bonded to three hydrogen atoms.
More Complex Compounds:
* Ethanol (C₂H₅OH): A common alcohol found in beverages.
* Aspirin (C₉H₈O₄): A common pain reliever.
* Caffeine (C₈H₁₀N₄O₂): A stimulant found in coffee and tea.
* Glucose (C₆H₁₂O₆): A simple sugar found in many foods.
* Sodium bicarbonate (NaHCO₃): Baking soda.
Key Characteristics of Compounds:
* Fixed Ratio: The elements in a compound always combine in a specific, fixed ratio by mass. For example, water always has two hydrogen atoms for every oxygen atom.
* New Properties: Compounds have properties that are different from the elements that make them up. For instance, water is a liquid at room temperature, while hydrogen and oxygen are gases.
* Chemical Change: Compounds can only be formed or broken down through chemical reactions.
Let me know if you want examples of specific types of compounds, like organic compounds, inorganic compounds, or ionic compounds!
