Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions. You know everything in universe, whatever you can see, touch, feel or smell is matter. It is about anything containing weight and occupies space. Chairs are matter, table is matter, walls, room, fan, black board, chalk, and in fact everything that is present around us, even the air, we breathe.
Analytical chemistry
Involves the identification of qualitative analysis of compounds and mixtures and also used in determining the amount proportions in the constituents been used. It uses some techniques like titration, precipitation, spectroscopy, chromatography to get the results. In simpler words it is a subject that is involved in conducting tests of substances to know their composition. It consists of classical, wet chemical methods and modern, instrumental methods. It is focused on improvement in experimental design, chemo metrics and the creation of new measuring tools. It has broad applications to forensics, medicine, science and engineering.
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Inorganic chemistry
This is the study of all substances that lack the carbon hydrogen bond. Individual study of metals like Sodium, Iron just to mention a few and also nonmetals such as Phosphorus, Oxygen all falls under this category. It is divided into two parts. The first one involves the reactions of compounds and the elements .There involve a bunch of rules, but remember, since chemistry is an laboratory science, exceptions are common. It is exceptions that should be remembered and paid a lot of attention to. For example, iron can be solved in acids, however not in concentrated sulfuric acid. In the first it can be memorized. Further thinking of this phenomenon leads to the invention of the idea of polarization and evaporation. The second part is principals of chemistry.
Biochemistry
Such as how chemicals from the brain bring about puberty, mood changes, or perhaps why Benadryl will make some people sleep and keep others awake. Perhaps why the body produces histamine in the presence of bee venom, and someone else just feels a little pain. It has become the foundation for understanding all biological processes. It has provided explanations for the causes of many diseases in humans, animals and plants.
Physical chemistry
It is concerned with interpretation of phenomenon of chemistry in terms of underlying principles of physics. It is an essential of the interpretation of techniques of investigation and findings, particularly these methods are becoming ever more sophisticated and their full potential can only be realized by strong theoretical backing.
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