Final answer:
Components that are chemically combined are known as a compound, which is a pure substance with a fixed ratio of elements bonded together, differing from mixtures where substances are not chemically combined.
Step-by-step explanation:
In chemistry, the classification of matter where the components are chemically combined is known as a compound. This differs from a mixture, where the individual substances maintain their own properties and can be separated by physical means. In contrast, a compound is a pure substance with components bonded together in a fixed ratio.
For example:
- Water (H₂O) is a compound because it is made of hydrogen and oxygen chemically combined in a fixed ratio.
- Soil would be a heterogeneous mixture as it contains different substances that are not chemically combined.
- Salt water is a homogeneous mixture where the salt is dissolved evenly throughout the water.
Metals, nonmetals, and metalloids, on the other hand, refer to elements or semi-metals with specific physical properties and are placed in the periodic table based on those characteristics.