atoms and compouds

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…