Question

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Answer 1

Answer:

1) what is an atom?

2) what do you mean by pure substances?

3)what is an element?

4) Define compound.

5) what is a mixture?

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Answer 2

Answer:

1. When we can say that substance is pure....

2. Define : mixture

3. the mixture is pure substance . true / false

4. In which state matter has least kinetic energy..

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