A substance that is either an element or a compound is called a?

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Prepare for the GMAS 8th Grade Science Test. Engage with flashcards and multiple choice questions, all with hints and explanations for effective studying. Ace your exam with ease!

Multiple Choice

A substance that is either an element or a compound is called a?

Explanation:
Pure substances have a fixed, uniform composition. An element is a pure substance made of a single kind of atom, while a compound is also a pure substance but formed when two or more elements are chemically bonded in a definite ratio. A mixture, on the other hand, contains two or more substances that are physically combined and can vary in proportion, so it is not a pure substance. Since both elements and compounds fit the idea of a substance with consistent composition, the term that describes them is pure substance.

Pure substances have a fixed, uniform composition. An element is a pure substance made of a single kind of atom, while a compound is also a pure substance but formed when two or more elements are chemically bonded in a definite ratio. A mixture, on the other hand, contains two or more substances that are physically combined and can vary in proportion, so it is not a pure substance. Since both elements and compounds fit the idea of a substance with consistent composition, the term that describes them is pure substance.

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