1.MATTER IN OUR SURROUNDING.

[***2.IS MATTER AROUND US PURE.***](https://momentous-guanaco-e06.notion.site/2-IS-MATTER-AROUND-US-PURE-33e8662f38f0419a8b9a16b8a661e6dd)

3.ATOM AMD MOLECULES

4.STRUCTURE OF ATOM

https://www.google.com/imgres?imgurl=https%3A%2F%2Fbright-culture.com%2Fwp-content%2Fuploads%2F2021%2F06%2F5-Steps-to-Understand-Chemistry-optimized.png&imgrefurl=https%3A%2F%2Fbright-culture.com%2Fblog%2F5-steps-to-understand-chemistry-a-step-by-step-guide%2F&docid=OhXG7rto-ku82M&tbnid=Q_n3elFahclhEM&vet=12ahUKEwju-6Cn3a2EAxWas1YBHXsGADsQM3oECD0QAA..i&w=2000&h=2000&ved=2ahUKEwju-6Cn3a2EAxWas1YBHXsGADsQM3oECD0QAA