Question

13. Pure substance can be classified as
and ..​

Answer 1

Answer:

We can divide pure substances into two classes: elements and compounds. Pure substances that cannot be broken down into simpler substances by chemical changes are called elements.

Explanation:

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Answer 2

Answer:

"chemical"

Explanation:

Pure substance are further classified as elements and compounds. An element is a substance that consists of only one type or kind of atom. An element is a pure substance as it cannot be broken down or transformed into a new substance even by using some physical or chemical means.

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