Multiple Choice
Aluminum foil is primarily made of aluminum metal. In the classification of matter, aluminum is best classified as which of the following?
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3. Matter and Energy
Classification of Matter
Multiple Choice
In the classification of matter, which element must be present in an organic compound?
A
Chlorine (Cl)
B
Carbon (C)
C
Sodium (Na)
D
Iron (Fe)
Verified step by step guidance1
Understand that organic compounds are primarily defined by the presence of carbon atoms in their molecular structure.
Recall that organic chemistry is the branch of chemistry that studies carbon-containing compounds, especially those with carbon-hydrogen (C-H) bonds.
Recognize that while elements like chlorine (Cl), sodium (Na), and iron (Fe) can be part of some compounds, they are not required for a compound to be classified as organic.
Identify that the key element that must be present in all organic compounds is carbon (C).
Conclude that the presence of carbon is the defining characteristic that classifies a compound as organic.
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