Posted by VINAY on Feb. 13, 2014, 9:50 p.m.
Chemistry, a branch of physical science, is the study of the composition, structure, properties and change 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 , change in phases of matter and seperation of mixtures. Finally, properties of matter such as alloys or polymersare considered.