Ozone
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Ozone, also called trioxygen, is an inorganic molecule with the chemical formula O3. It is a pale-blue gas with a distinctively pungent odour. It is an allotrope of oxygen that is much less stable tha
Christian Friedrich Schönbein (18 October 1799 – 29 August 1868)
A prototype ozonometer built by John Smyth in 1865
Concentration of ozone as measured by the Nimbus-7 satellite
Ozone cracking in natural rubber tubing
Oxygen
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Oxygen is a chemical element; it has the symbol O and its atomic number is 8. It is a member of the chalcogen group in the periodic table. It is highly reactive, a nonmetal, and a potent oxidizing age
Liquid oxygen (O2 at below −183 °C)
Among several contemporaries who had made discoveries independently from one another, Joseph Priestley was the first to publish his findings on oxygen.
Antoine Lavoisier discredited the phlogiston theory.
Robert H. Goddard and a liquid-oxygen–gasoline rocket