Which of the following best describes aluminum foil in terms of the classification of matter?

• A. Colloid
• B. Heterogeneous material
• C. Compound
• D. Homogeneous material

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the classification of matter categories given: colloid, heterogeneous material, compound, and homogeneous material.
2. Step 2: Recall that a compound is a substance made of two or more elements chemically combined in fixed proportions, which aluminum foil is not, since it is a pure element (aluminum).
3. Step 3: Recognize that a heterogeneous material has visibly different parts or phases, which aluminum foil does not exhibit as it appears uniform throughout.
4. Step 4: Know that a colloid is a mixture where particles are dispersed but not dissolved, often showing some scattering of light, which does not describe aluminum foil.
5. Step 5: Conclude that aluminum foil is a homogeneous material because it is uniform in composition and appearance throughout, consisting of only aluminum atoms arranged consistently.