diffusion
Yes, it is molecules floating through the air.
Molecules of certain compounds, especially liquids, will either evaporate or go into suspension in the air. Whe this occurs, the molecules can be detected by the sense of smell. The higher the concentration of perfume substances at the source, the greater the volume that will enter the air.
diffusion
diffusion
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diffusion
they have a beautiful smell because of the perfume they wear
because it is on you
Liquid to gas (which is to say, evaporation).
If perfume is sprayed inside a balloon and then the balloon is blown up, you can still smell the perfume from the outside of the balloon. This is because the material of the balloon is thin.
The molecules of perfume are in a gaseous state and mixing with the molecules of air in the room. All of them undergo random motion at all times as a result of the internal ("heat") energy that they have absorbed.