Most people imagine ions to be tiny charged particles which float in the air.
My view is different. After playing with the dense white mist which is created by ultrasonic humidifiers , I realized that tiny droplets of water suspended in the air do not act like particles. They don't act like very small rain. When the droplets move, they drag the surrounding air along with them. The individual droplets might be heavy, but since they are so small they don't fall very fast.