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Chemistry is a branch of physical science that studies the composition, properties and behavior of matter . Chemistry is chiefly concerned with atoms  and their interactions with other atoms - for example, the properties of the chemical bonds formed between atoms to create chemical compounds. As well as this, interactions including atoms and other phenomena - electrons  and various forms of energy - are considered, such as photochemical reactions, oxidation-reduction reactions, changes in phases of matter and separation of mixtures. Finally, properties of matter such as alloys or polymers  are considered.

Chemical Sciences or Chemistry is further divided into five broader categories:-

  • Analytical Chemistry
  • Biochemistry
  • Inorganic chemistry
  • Organic chemistry
  • Physical chemistry
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