Here's why:
* Chemical Compounds: A chemical compound is formed when two or more different elements combine chemically in a fixed ratio.
* Molecules: A molecule is the smallest unit of a compound that can exist independently. It's formed when two or more atoms bond together.
* Properties: The properties of a compound arise from the specific arrangement and interactions of its atoms within the molecule.
For example, a water molecule (H₂O) is the smallest unit of water that exhibits the characteristic properties of water, like being a liquid at room temperature and dissolving many substances.
It's important to note that some compounds, particularly ionic compounds, don't form distinct molecules. Instead, they exist as a continuous lattice of ions. In these cases, the formula unit represents the smallest repeating unit in the crystal structure, and it still retains the compound's properties.
