Here's why:
* Elements: Pure substances that cannot be broken down further by chemical means. Examples: Oxygen (O), Carbon (C), Hydrogen (H).
* Compound: A substance formed when two or more different elements combine chemically in a fixed ratio. Examples: Water (H₂O), Carbon dioxide (CO₂), Sodium chloride (NaCl).
Key characteristics of a compound:
* Definite proportions: The elements always combine in the same ratio by mass.
* New properties: Compounds have different properties than the elements they are made of. For example, water (H₂O) is a liquid at room temperature, while hydrogen (H₂) and oxygen (O₂) are gases.
* Chemically bonded: The elements in a compound are held together by chemical bonds.
Let me know if you'd like more examples or explanations!
