What term describes a substance that contains only one type of element?

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Multiple Choice

What term describes a substance that contains only one type of element?

Explanation:
A substance that contains only one type of element is an element. An element is the simplest kind of pure substance, made of one kind of atom, and it cannot be broken down into simpler substances by chemical means. If a substance has just one element, it isn’t a compound (which would require two or more elements) and it isn’t a mixture (which blends different substances). For example, O2 is still just oxygen atoms bonded together, so it’s still an element. This is why the correct term is element.

A substance that contains only one type of element is an element. An element is the simplest kind of pure substance, made of one kind of atom, and it cannot be broken down into simpler substances by chemical means. If a substance has just one element, it isn’t a compound (which would require two or more elements) and it isn’t a mixture (which blends different substances). For example, O2 is still just oxygen atoms bonded together, so it’s still an element. This is why the correct term is element.

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