What is the difference between O2 and 2O?
O2 is a molecule consisting of 2 atoms of oxygen. 2O denotes two seperate oxygen atoms. O2 is a molecule and thus it is stable. 2O, whichconsists of 2 different atoms and thus these 2 atoms are ready to combine with any other element like hydrogen.
so,O2 is a molecule of element consisting of combination of 2 atoms of oxygen. 2O denotes two seperate oxygen atoms Which are not together.