Multiple Choice
In the classification of matter, what is the smallest unit of a compound that still retains the compound’s chemical properties?
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3. Matter and Energy
Classification of Matter
Multiple Choice
In the classification of matter, how is milk best classified?
A
Compound
B
Homogeneous mixture (colloid)
C
Heterogeneous mixture (suspension)
D
Element
Verified step by step guidance1
Recall the main categories in the classification of matter: elements, compounds, homogeneous mixtures, and heterogeneous mixtures.
Understand that an element consists of only one type of atom, and a compound consists of two or more elements chemically combined in a fixed ratio.
Recognize that mixtures contain two or more substances physically combined, and they can be homogeneous (uniform composition) or heterogeneous (non-uniform composition).
Consider the nature of milk: it contains water, fats, proteins, and other components mixed together but not chemically bonded, making it a mixture rather than a compound or element.
Since milk appears uniform to the naked eye but contains tiny particles dispersed throughout (like fats and proteins), it is best classified as a homogeneous mixture, specifically a colloid.
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