Multiple Choice
In the classification of matter, how should black coffee (filtered, unsweetened) be classified?
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3. Matter and Energy
Classification of Matter
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All organic compounds must contain which element?
A
Nitrogen (N)
B
Sulfur (S)
C
Oxygen (O)
D
Carbon (C)
Verified step by step guidance1
Understand the definition of organic compounds: Organic compounds are primarily chemical compounds that contain carbon atoms bonded to other elements.
Recall that carbon is unique because it can form four covalent bonds, allowing it to create complex molecules essential for life.
Recognize that while organic compounds often contain other elements such as hydrogen, oxygen, nitrogen, sulfur, and phosphorus, the presence of carbon is mandatory.
Note that elements like nitrogen, sulfur, and oxygen can be part of organic compounds but are not required in every organic molecule.
Conclude that the defining element that all organic compounds must contain is carbon (C).
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