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Answer:

Explanation:

Elements are made of only one kind of atom. The particles can be a single atom or a molecule made of only one kind of atom. There is no physical change that can separate elements into more than one kind of substance. This makes an element a pure substance.

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Answer:

Sample Response: An element is considered a pure substance because it is made up of only one type of atom and cannot be broken down into a simpler form.

Explanation:

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