Chemistry: DEFINITIONS
Chemistry is the science that is concerned with the composition, properties and the structure of matter. It also explains how a substance undergoes changes in a chemical reaction. A physical science for studying molecules, atoms, compounds, crystals of matters whether in combination or isolation may use the concepts of either entropy or energy in concern with the spontaneity of the chemical processes.

Alchemy: it is the study of composition of movement, water, growth, disembodying, embodying, bonding with the spirits and drawing the spirits from the bodies and with in the bodies.

Chemistry: it is a study of the material principles of the mix bodies. This definition was given in 1661 and the definition was changed later on in 1663. According to the new definition chemistry is the scientific art through which a person learns to mix, dissolves different substances, draw different bodies from their mixture, and combine them again to form new substances, which can give higher performances.

Chemistry: it is an art of resolving compound, mixture, molecules and aggregate of the bodies into their original compounds and composing new bodies using reverse principles.
There have been many definitions of chemistry that have been deduced by many people from time to time depending upon the experiments they carry out and new inventions. Chemistry is a very important subject in our life and helps us to understand how different substances react with each other to form new products and substances.