Which term describes a combination of two or more substances that are not chemically bonded?

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 combination of two or more substances that are not chemically bonded?

Explanation:
When substances are just combined without forming new chemical bonds, they form a mixture. In a mixture, each component keeps its own identity and properties, and you can usually separate them again using physical methods like filtration, evaporation, or manual separation. That’s why this term fits a situation where two or more substances are blended without chemical bonding. In contrast, a compound involves chemical bonds that link atoms into a new substance with a definite composition, so the original elements can’t be separated by simple physical means. A solution is a specific kind of mixture where one substance dissolves in another to form a uniform composition at the molecular level, but it’s still not a new compound. An alloy is a metal-based mixture with its own distinct structure and properties due to the combination of elements, often with metallic bonding, which makes it a specialized type of mixture rather than a simple non-bonded blend.

When substances are just combined without forming new chemical bonds, they form a mixture. In a mixture, each component keeps its own identity and properties, and you can usually separate them again using physical methods like filtration, evaporation, or manual separation. That’s why this term fits a situation where two or more substances are blended without chemical bonding.

In contrast, a compound involves chemical bonds that link atoms into a new substance with a definite composition, so the original elements can’t be separated by simple physical means. A solution is a specific kind of mixture where one substance dissolves in another to form a uniform composition at the molecular level, but it’s still not a new compound. An alloy is a metal-based mixture with its own distinct structure and properties due to the combination of elements, often with metallic bonding, which makes it a specialized type of mixture rather than a simple non-bonded blend.

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