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CHEMISTRY basic concepts of chemistry
This document provides an overview of basic chemistry concepts. It defines chemistry as the study of matter and its properties. The main branches of chemistry are described as organic, inorganic, physical, industrial, analytical, biochemistry, and nuclear chemistry. Matter is classified as pure substances or mixtures based on its composition. Elements are the basic units that make up all matter and can exist as atoms or molecules. Chemical properties and reactions are governed by laws such as the law of conservation of mass. The mole concept is introduced as a unit used to quantify the amount of substance.
