Ultrasonic humidifiers are the quietest humidifiers available, and the ideal choice when noise level is a concern (if you are a light sleeper). In general, a warm moisture humidifier will be much quieter than a cool moisture evaporative humidifier.
Iodine is a chemical element with symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at a standard conditions that sublimes readily to form a violet gas. The elemental form was discovered by the French chemist Bernard Courtois in 1811.
Sublimation. Sublimation is the transition of a substance directly from the solid to the gas phase without passing through an intermediate liquid phase.Sublimation is an endothermic phase transition that occurs at temperatures and pressures below a substance's triple point in its phase diagram.he transition of a substance from the solid phase directly to the vapor state such that it does not pass through the intermediate liquid phase. sublimation (Noun). The transformation of an impulse into something socially constructive. Origin: From sublimationem.