Question

1. the two types of pure substances are (3pts) compounds and elements. compounds and solutions. elements and mixtures. mixtures and solutions. solutions and elements.

Explanation:

Pure substances are forms of matter with a fixed, uniform composition. They are divided into two categories: elements (substances that cannot be broken down into simpler substances by chemical means) and compounds (substances made of two or more elements chemically combined in a fixed ratio). Mixtures and solutions are not pure substances, as they have variable compositions.

Answer:

☑ compounds and elements.