Chemistry is the branch of science that deals with the properties, composition, and structure of elements and compounds. It is a natural science that covers the elements that makeup matter to the compounds composed of atoms, molecules, and ions.

Chemistry is the study of matter, analyzing its structure, properties and behavior to see what happens when they change in chemical reactions. It is the understanding of atoms and what determines how they react. It turns out reactivity is often largely mediated by the electrons that orbit atoms and the way these are exchanged and shared to create chemical bonds.