atoms and compouds

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elements, compounds and mixture 

  • The smallest particles is an atom. atoms combine together to form molecules.
  • Elements and compounds exist as molecules
  • There are two or more atoms in a compound
  • There are approximately 100 elements listed on the periodic table
  • Water is a compound because it is made from hydrogen and oxygen
  • There are four atoms in a total in a moleculre of sulfur trioxide
  • Dissolving occurs when solid salt is added to water and stirred 
  • Air is a mixture
  • Diffusion occcurs most quickly in gases. It occurs only slowly in liquids 
  • Water


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