A substance composed of two or more elements chemically combined in fixed proportions is a compound.

Study for the IB Marine Science Standard Level Exam. Prepare with interactive quizzes and in-depth explanations. Use our resources to excel in your marine science knowledge!

Multiple Choice

A substance composed of two or more elements chemically combined in fixed proportions is a compound.

Explanation:
When elements join by chemical bonds to form a new substance with a definite, fixed ratio, you’re describing a compound. The bond creation gives a unique composition and properties different from the individual elements. Pure elements are single kinds of atoms, while mixtures are combinations of substances not bonded and can have varying proportions. A solution is a homogeneous mixture where a solute dissolves in a solvent, not forming a new substance with a fixed composition. So the description matches a compound, like water (H2O) or salt (NaCl).

When elements join by chemical bonds to form a new substance with a definite, fixed ratio, you’re describing a compound. The bond creation gives a unique composition and properties different from the individual elements. Pure elements are single kinds of atoms, while mixtures are combinations of substances not bonded and can have varying proportions. A solution is a homogeneous mixture where a solute dissolves in a solvent, not forming a new substance with a fixed composition. So the description matches a compound, like water (H2O) or salt (NaCl).

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy