Question

which classification of matter includes materials that can no longer be identified by their individual properties? a) compound b) mixture c) element

Explanation:

To solve this, we analyze each option:

• Option A (Compound): A compound is a substance formed when two or more elements are chemically bonded together. In a compound, the individual elements lose their original properties and exhibit new properties of the compound. For example, hydrogen (a flammable gas) and oxygen (a gas that supports combustion) combine to form water (\(H_2O\)), which has completely different properties (liquid at room temperature, not flammable in the way hydrogen is, etc.).
• Option B (Mixture): In a mixture, the substances retain their individual properties. For example, a mixture of salt and sand still has the properties of salt (like solubility in water) and sand (insolubility in water).
• Option C (Element): An element is a pure substance that cannot be broken down into simpler substances by chemical means, and it retains its unique properties.

Since the question asks for the classification where materials can no longer be identified by their individual properties, the correct answer is a compound.

Answer:

A) Compound