Can someone explain this to me?

The chemical and physical properties of substances are determined by their structure at an atomic scale. What does this mean?

And also

Substances change and new substances are produced by rearranging atoms through atomic interactions and energy transfer. What does this mean?

Can you explain them in simple in terms? I don't understand chemistry. Thanks.

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Ynotisay · M

You can look at it like atoms (protons, neutrons, electrons) are the building blocks for matter. They form together to create molecules and molecules make up pretty much everything around us. And that's about the extent of my knowledge on the topic so please...no follow-up questions. :)