Chemistry, the science that deals with the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes. Everything around us involves chemistry and chemical change. From the time we wake up, we stumble upon products of chemistry viz metals and non-metals and chemical changes. An example of chemistry is the study of protons and neutrons. Chemistry is a big part of our everyday life. One can easily observe this branch of science in different spheres of human life such as in the food we eat, the air we breathe, the various cleaning agents we use, so much so that even human emotions are sometimes a result of chemical reactions within our body