Question

when two or more substances combine, but each keeps its own properties, the new combination is called a(an)

Explanation:

A mixture is formed when two or more substances combine without a chemical reaction, so each substance keeps its own properties. An element is a pure substance with only one type of atom. A compound is formed by a chemical reaction of elements. Homogeneous mixtures have a uniform composition, while heterogeneous mixtures have a non - uniform composition. Since the question is about substances combining while keeping their properties, it fits the definition of a mixture.

Answer:

mixture