A student wrote a table comparing pure substances and mixtures.

Question

Pure Substances:
elements and compounds
cannot be separated using physical means

Mixtures:
contains two or more substances
are chemically combined

The student made a mistake on their table. Which statement BEST describes the mistake 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.

Answer 1

D. Mixtures are substances that are not chemically combined.

This statement is incorrect, as mixtures are not chemically combined substances.