What are the two forms of oxygen found in the atmosphere?

The two forms of oxygen found in the atmosphere are:

      • Molecular oxygen(O2)
      • Ozone(O3)

Molecular oxygen

Molecular oxygen (O2 ) is a diatomic molecule composed of two oxygen atoms held together by a covalent bond. Molecular oxygen is essential for life, as it is used for respiration by many organisms. In addition, molecular oxygen is important for combustion – especially in the combustion of fuels for energy. There is a double bond between these two atoms. Since the two oxygen atoms have eight electrons around them, the oxygen molecule is less reactive.


Ozone (O3) is a highly reactive gas composed of three oxygen atoms. It is both a natural and a human-made product that occurs in the Earth’s upper atmosphere. Ozone is also a powerful oxidising agent.

  • Ozonolysis is a reaction of alkenes with ozone. Ozone can be produced in the lab using a machine called an Ozonator.
  • This ozone is passed through a solution of the alkene, first producing an ozonide.
  • This ozonide is subsequently reduced, giving cleavage around the double bond, with oxygen attached to each carbon from the double bond.

Was this answer helpful?


4.5 (8)


Choose An Option That Best Describes Your Problem

Thank you. Your Feedback will Help us Serve you better.


  1. All subject to Good

    1. Great👍

Leave a Comment Cancel reply

Your Mobile number and Email id will not be published. Required fields are marked *




Free Class