# Whats the difference between 2O and O2 [duplicate]

I just saw something in a chemistry lesson what got me confused.

What is the difference between $\ce{2O}$ and $\ce{O2}$?

Thanks for the help!

## marked as duplicate by airhuff, paracetamol, Jon Custer, Todd Minehardt, Nilay GhoshMay 31 '17 at 2:43

• The 2 O represents two separate oxygen atoms, ( not connected to one another so free to move around and react independently ), the $\ce{O2}$ is molecular oxygen. – porphyrin May 30 '17 at 15:07
1. $\ce{2O}$ is basically two atoms of oxygen, unbonded and separate.
2. On the other hand, $\ce{O2}$ is oxygen molecule, which is more commonly called oxygen gas.