Knockout NEET May 2021 (One Month)
An exhaustive E-learning program for the complete preparation of NEET..
₹ 14000/-
₹ 6999/-
Buy Now
The key difference between 2O and O2 is that 2O means there are two free oxygen atoms, whereas O2 means it is a molecule having two oxygen atoms. Further, 2O is in the elemental state while O2 is in the molecular state