Which term refers to a substance composed of atoms of two or more different elements joined by chemical bonds?

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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 refers to a substance composed of atoms of two or more different elements joined by chemical bonds?

Explanation:
A substance made by chemically bonding atoms from two or more different elements is a compound. Elements are pure substances with only one kind of atom. If elements are just mixed together without bonding, you get a mixture; a solution is a homogeneous mixture where something is dissolved, but no new chemical bonds form between the elements. In a compound, the elements combine in definite proportions and form a material with properties that are different from the individual elements, and it can be separated into its elements only by chemical reactions. Examples include water (H2O) and table salt (NaCl).

A substance made by chemically bonding atoms from two or more different elements is a compound. Elements are pure substances with only one kind of atom. If elements are just mixed together without bonding, you get a mixture; a solution is a homogeneous mixture where something is dissolved, but no new chemical bonds form between the elements. In a compound, the elements combine in definite proportions and form a material with properties that are different from the individual elements, and it can be separated into its elements only by chemical reactions. Examples include water (H2O) and table salt (NaCl).

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