chemistry facts...

• Unlike many substances, water expands as it freezes. An ice cube takes up about 9% more volume than the water used to make it.
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• If you pour a handful of salt into a full glass of water, the water level will actually go down rather than overflowing the glass.
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• There is about 1/2 lb or 250 g of salt (NaCl) in the average adult human body.
  
  
• A pure element can take many forms. For example, diamond and graphite both are forms of pure carbon.
  
  
• The chemical name for water (H2O) is di-hydrogen monoxide.
  
  
• The only letter that doesn't appear on the periodic table is J.