define atom and molecules?
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1. What are Molecules?
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A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. Molecules are distinguished from ions by their lack of electrical charge.
2. What are Atoms?
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An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.
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An atom is a particle of matter that uniquely defines a chemical element.
A molecule is a particle made up of two or more atoms that are chemically bonded together
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