Multiple Choice
How many different substances can an element be broken down into by chemical means?
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1. Intro to General Chemistry
Classification of Matter
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Which of the following best describes a similarity between elements and compounds?
A
Both consist of only one type of atom.
B
Both are mixtures of two or more substances.
C
Both can be separated into simpler substances by physical means.
D
Both are pure substances with a fixed composition.
Verified step by step guidance1
Understand the definitions: Elements are pure substances made of only one type of atom, while compounds are pure substances made of two or more types of atoms chemically bonded together.
Recognize that both elements and compounds have a fixed composition, meaning their makeup does not vary; elements consist of one kind of atom, and compounds have a specific ratio of atoms.
Note that mixtures, unlike elements and compounds, contain two or more substances physically combined and can vary in composition.
Recall that elements and compounds cannot be separated into simpler substances by physical means; compounds require chemical methods for separation.
Conclude that the key similarity is that both elements and compounds are pure substances with a fixed composition.
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