[Ranixin]

As you may know that ozone is between 10 and 50km above the Earth's surface. My question is why with its density of 2.14 kg/m3 why isnt the ozone layer below the other gasses in the atmosphere?

Densities:

H2- 0.00008988 g/cm3
O2- 0.001429 g/cm3
N2- 0.0012506 g/cm3
O3- 0.002141 g/cm3

As you can see that ozone has a greater density than all the gasses, why doesnt it sink, instead is above all hte gases?

[DevaDevil]

Not an expert by any means on this; but my guess would be that because of the sun's UV radiation ozone is mainly produced in the upper layers (where the radiation is most intense), then gets broken down on the way down to earth (by a.o. free radicals as Cl^. and Br^.), while the upper layer gets replenished by UV-radiation.

[Borek]

Ozone is not that stable, so it decomposes even without Cl. My take is that it decomposes before reaching Earth surface.