Basics

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MATTER is anything that has both mass and volume. Matter is made up of atoms and molecules. Matter can exist in four states -solid,liquid,gas and plasma. A MOLECULE is an electrically neutral group of atleast two or more atoms held together by covalent chemical bonds. An ION is an atom or molecule in which the total number of electrons is not equal to the number of protons,giving it a net positive or negative electrical charge.