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What are molecules?
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A molecule is the simplest part of a substance that can take part in chemical reactions. It is a group of two or more atoms linked together. The atoms may be the same or different. For example, a molecule of water is made of two hydrogen atoms linked to an oxygen atom. An oxygen molecule is made of two oxygen atoms linked together.
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Book:
Best Ever Q&A
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Section:
Science & Technology
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Chapter:
Chemicals & Matter
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