A cornerstone of the sciences, chemistry is focused on studying the nature of all matter that exists, and how different types of matter interact with each other. Chemistry also studies how such matter changes, as well as analyzes the type of energy generated due to matter interactions and changes. 

Chemistry can be divided into four main branches:

  1. Organic chemistry:- the study of the properties, structure, and reaction of hydrocarbons (matter that only contains, or is based on carbon and hydrogen).
  2. Inorganic chemistry:- focuses on the study of matter that is based on elements other than hydrocarbons.
  3. Analytic chemistry:- focuses on the study of individual components of substances and their relative amounts. 
  4. Physical chemistry:- uses the established principles of physics to study chemical compounds and matter and their processes. 



                                               Chemistry at work. Image source


Chemistry permeates almost every other fields of research. Scientists use chemistry to track the currents of the oceans, determine the age of stars and planets, understand phenomena such as global warming, and even to analyze the most appropriate material for building skyscrapers.

As chemistry significantly contributes to other fields of research, it was necessary for researchers to focus on specialized chemistry fields such as biochemistry, electrochemistry, and quantum chemistry

The Periodic Table

Developed by Dmitry Mendeleyev in 1869, the periodic table has become a cornerstone in chemistry. The periodic table arranges elements into an orderly structure based on their underlying atomic characteristics. Each entry into the periodic table provides the symbol of each element, its name, its atomic weight, and its atomic number. Atomic numbers are understood based on the number of protons in each nucleus.


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