Here's why:
* Properties are specific traits or attributes that describe a substance. These can be physical (like color, density, melting point) or chemical (like reactivity, flammability, pH).
* Groups of substances are often classified based on shared properties. For example:
* Metals are grouped together because they share properties like good conductivity, malleability, and ductility.
* Acids share properties like sour taste and the ability to react with bases.
* Gases are defined by their ability to expand and fill their container.
Therefore, a property can be used to define an entire group of substances.