Question

part a
what is an element? a compound?
compound cannot be broken down into two or more simpler substances. element is made up of two or more compound in a fixed ratio and can be broken down into simpler substances
element cannot be broken down into two or more simpler substances. compound is made up of two or more elements in a fixed ratio and can be broken down into simpler substances
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Explanation:

An element is a pure substance that cannot be broken down into two or more simpler substances by chemical means. A compound is a substance made up of two or more different elements chemically combined in a fixed ratio and can be broken down into its constituent elements.

Answer:

The second option: Element cannot be broken down into two or more simpler substances. Compound is made up of two or more elements in a fixed ratio and can be broken down into simpler substances.