The primary substance from which all other chemical compounds and substances are made is a____________.

A) element
B) compound
C) mixture
D) pure substance

Bob Pursley answered above.

The primary substance from which all other chemical compounds and substances are made is an element, option A.

To arrive at this answer, we can eliminate options C and D. A mixture is a combination of different substances, so it cannot be considered the primary substance from which all other compounds and substances are made. A pure substance refers to a material that consists of only one type of particle, either an element or a compound. While this is closer to the correct answer, it is more accurate to say that the primary substance is an element, as compounds are made up of elements.

By process of elimination, we find that the correct answer is option A.