Question

daniella wrote a table comparing pure substances and mixtures. pure substances - elements and compounds - cannot be separated using physical means. mixtures - contains two or more substances - are chemically combined. daniella made a mistake on her table. which best describes the mistake she made? a. elements and compounds are considered mixtures. b. mixtures contain at least three or more substances. c. pure substances can be separated using physical means. d. mixtures are substances that are not chemically combined.

Explanation:

Elements and compounds are pure substances, not mixtures. Elements are the simplest form of matter and cannot be broken down further by chemical means. Compounds are made up of two or more elements chemically combined. Mixtures contain two or more substances that are not chemically combined and can be separated by physical means.

Answer:

A. Elements and compounds are considered mixtures.