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Select the term that refers to substances that cannot be broken down physically or chemically. A. alloy B. atoms C. molecules D. mixtures

User Cuong Lam
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B. an atom is the simplest form of a pure substance, it can't be physically or chemically broken down.
User Batbaatar
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B
Atoms are the fundamental units of composition of all matter and cannot be broken down.
User Idrositis
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