Which term describes a substance that is not a mixture and contains only one substance?

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Study for the Cambridge Science – States of Matter Test. Prepare with flashcards and multiple choice questions, with hints and explanations for each question. Ready yourself for your exam!

Multiple Choice

Which term describes a substance that is not a mixture and contains only one substance?

Explanation:
Pure describes a substance that is not a mixture and has a single composition throughout. A pure substance can be an element, like oxygen, made of one kind of atom, or a compound, like water, made of atoms joined in a fixed ratio. Mixtures, on the other hand, contain two or more substances physically blended and can usually be separated by physical means. So, the term that best fits “not a mixture and contains only one substance” is pure.

Pure describes a substance that is not a mixture and has a single composition throughout. A pure substance can be an element, like oxygen, made of one kind of atom, or a compound, like water, made of atoms joined in a fixed ratio. Mixtures, on the other hand, contain two or more substances physically blended and can usually be separated by physical means. So, the term that best fits “not a mixture and contains only one substance” is pure.

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