Multiple Choice
In the context of classifying matter, which element is the primary component of most fossil fuels (coal, petroleum, and natural gas)?
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3. Matter and Energy
Classification of Matter
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In introductory chemistry, organic compounds are defined as compounds that contain which element?
A
Sodium
B
Helium
C
Silicon
D
Carbon
Verified step by step guidance1
Understand the definition of organic compounds in chemistry: Organic compounds are primarily characterized by the presence of a specific element in their molecular structure.
Recall that organic chemistry is the study of carbon-containing compounds, which distinguishes them from inorganic compounds.
Recognize that the element carbon has the unique ability to form four covalent bonds, allowing it to create a vast variety of complex molecules.
Note that elements like sodium, helium, and silicon are not the defining elements of organic compounds; sodium is a metal, helium is a noble gas, and silicon is a metalloid.
Conclude that the element that defines organic compounds is carbon.
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