Both Part A and Part B refer to the following information:
A pure substance is a type of matter in which both the composition and chemical properties are constant, remaining the same throughout.
Both elements and compounds are classified as pure substances.
Part A
Though elements and compounds are similar in their classification as pure substances, there are differences in their compositions. Which statement correctly explains a key difference between the two?
A.
A compound is composed of only one type of atom, while an element is composed of two or more different types of atoms.
B.
A compound can be separated into different types of matter using physical means, while an element cannot.
C.
A compound is composed of two or more different types of atoms, while an element is composed of only one type of atom.
D.
A compound is two or more substances that combine due to a physical change, while an element forms due to a chemical change.
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The correct statement that explains a key difference between elements and compounds is:
C. A compound is composed of two or more different types of atoms, while an element is composed of only one type of atom.
Part B If you want to ask a follow-up question or have another part related to Part A, please feel free to provide that information!
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