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...Chemistry is the branch of science that deals with composition structure and properties matter called atoms molecule branches organic this study carbon compounds especially hydrocarbons their derivatives inorganic all other elements except it largely concerns itself minerals found in earth s crust physical explanation fundamental principles governing various chemical phenomena main concern basically concerned laws theories different industrial involved processes studied under analytical qualitative quantitative analysis substances biochemistry changes going on bodies living organisms plants animals nuclear reactions such as fission fusion transmutation etc are measurement every substance has unique or characteristic these can be classified into two categories those which measured observed without changing identity e g colour odour melting point boiling density observation requires a change to occur burning mg ribbon air include acidity basicity combustibility many length area volume na...