Final answer:
In chemistry, a particle is a tiny amount of matter with defined properties, they play a crucial role in chemical reactions.
Step-by-step explanation:
In chemistry, a particle refers to a tiny amount of matter with defined physical and chemical properties. It can be as small as an atom or molecule, or as large as a small solid object. Particles play a crucial role in chemical reactions, as they interact with one another to form new substances. For example, in a chemical reaction between hydrogen and oxygen to form water, the particles involved are the hydrogen and oxygen atoms, and the water molecules produced.
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