• Ozone is a gas that is naturally present in our atmosphere.
  
  
• Ozone's chemical formula is O3 because an ozone molecule contains three oxygen atoms.
  
  
• Ozone was discovered in laboratory experiments in the mid-1800s.
  
  
• Ozone's presence in the atmosphere was later discovered using chemical and optical measurement methods.
  
  
• The word Ozone is derived from the Greek word "ozein", which means "to smell".
  
  
• Ozone has a pungent odor that allows it to be detected even in very small amounts.
  
  
• Ozone reacts rapidly with many chemical compounds and is explosive in concentrated amounts.
  
  
• Electrical discharges are generally used to produce Ozone for industrial processes such as air and water purification, as well as, the bleaching of textiles and food products.