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  • Welcome to Science!
  • A compound is a pure substance composed of two or more different elements that are chemically bounded
  • An element is a pure substance that is composed if a single type of atom.
  • An example of an element is iron. 
  • An atom is a tiny particle that makes up all types of matter.
  • A group of two or more atoms held together by chemical bonds is a molecule.
  • Water is a molecule and a compound.  N2 (element and molecule) 
  • Salt (NaCl) is an example of a compound.
  • A mixture is two or more substances that are only physically blended.
  • An example of this is ice cubes in a drink.
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