Helium.com | Chemistry | The characteristics of an atom http://www.helium.com/knowledge/175182-the-characteristics-of-an-atom.xml Helium.com > Chemistry > The characteristics of an atom en-us Copyright Helium.com Mon, 07 Jul 2008 21:04:48 GMT Mon, 07 Jul 2008 21:04:48 GMT An atom is the smallest unit of a particular element that still retain all the properties of that element. The various characteristics of an atom g... http://www.helium.com/items/1653568-structure-of-an-atom Mon, 23 Nov 2009 16:24:11