The Atom - pt. 1

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   atom      atoms      atoms      billions      century      electrons      experiments      neutral      neutrons      particles      positive      solids      three   

All substances - liquids, gases, and - are composed of . You see, smell, touch and taste groups of atoms. The very eyes with which you read this computer are composed of billions upon of atoms. What would these billions of look like if we could see them? During the last half of the 19th , scientific were performed which proved that the is not a hard little ball, but was made up of even smaller of various types. The most important of these particles are the which have a negative charge, protons which have a charge and which have a charge.