Sagot :
Answer:
A material composed of two or more substances is a mixture. Elements and compounds are both examples of pure substances. A substance that cannot be broken down into chemically simpler components is an element. ... It is considered a substance because it has a uniform and definite composition.
Explanation:
Answer:
A material composed of two or more substances is a mixture. Elements and compounds are both examples of pure substances. A substance that cannot be broken down into chemically simpler components is an element. ... It is considered a substance because it has a uniform and definite composition.