Multiple Choice
All organic compounds must contain which element?
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3. Matter and Energy
Classification of Matter
Multiple Choice
Aluminum foil is primarily made of aluminum metal. In the classification of matter, aluminum is best classified as which of the following?
A
Element
B
Heterogeneous mixture
C
Homogeneous mixture
D
Compound
Verified step by step guidance1
Recall the classification of matter, which includes elements, compounds, homogeneous mixtures, and heterogeneous mixtures.
Understand that an element is a pure substance made of only one type of atom and cannot be broken down into simpler substances by chemical means.
Recognize that a compound consists of two or more different elements chemically bonded together in fixed proportions.
Know that a homogeneous mixture has a uniform composition throughout, but contains more than one substance physically combined.
Identify that aluminum foil is made of only aluminum atoms, so it is a pure substance and fits the definition of an element.
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