A pure substance is made up of only one type of particle and has a consistent composition and set of properties throughout. In contrast, a mixture contains two or more different substances that are physically combined, meaning they can retain their individual properties. The components of a mixture can often be separated by physical means, while a pure substance cannot. Additionally, pure substances have a fixed melting and boiling point, unlike mixtures, which can vary in these physical properties.
Explain in 3-4 sentences, in your own words, what makes a pure substance different from a mixture
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