4 Chapters
Class 9 Chemistry is useful in helping students understand the functioning of the world scientifically. The chapter of Matter In Our Surroundings will discuss how matter is an important part of our planet and how it makes up the whole planet. In addition to giving information about the matter, you will also learn about chemical and physical properties of matter. Moreover, it also discusses the physical nature of matter and explains terms like evaporation, boiling point and more. Next, Is Matter Around Us Pure will clear this question and make students aware of the pollutants present in the atmosphere. It also discusses concepts of solutions, pure substances, mixtures, suspensions, and more. Similarly, it will also explain homogenous and heterogeneous substances. Atoms and Molecules is a chapter that will explain all about atoms in detail. It will also discuss molecules and those of compounds and elements. Further, students will learn about ions, the law of conservation of energy, the law of chemical combination, Dalton's atomic theory and more. Finally, the Structure of the Atom will discuss popular theories or models with respect to atoms that J.J. Thompson gave. In addition to the model, it will also discuss its drawbacks and explain the divisibility of atoms.
Towards the end of the nineteenth century, Maxwell's equations established that light was an electromagnetic wave. However, in the beginning of the twentieth century, scientists unravelled one of the best-kept secrets of nature - the wave particle duality. Matter and radiations had a dual nature. Let's learn in detail!
Matter is all around us. You are reading this on a matter and you yourself are a matter. But do you know whether a matter can change its stage? What are the characteristics of particles of matter? What is evaporation? How many states of matter exist? Let's find out more about the matter in our surroundings.
Towards the end of the nineteenth century, Maxwell's equations established that light was an electromagnetic wave. However, in the beginning of the twentieth century, scientists unravelled one of the best-kept secrets of nature - the wave particle duality. Matter and radiations had a dual nature. Let's learn in detail!
Everything we see around us is made up of something. For instance, table is made from wood, wood in-turn comes from trees and, trees come from seed. Now, these seeds are made up of tiny matter called 'Atom'. But what is an atom made of? Let us find out.