Relative humidity. Relative humidity (RH) is the ratio of the partial pressure of water vapor to the equilibrium vapor pressure of water at a given temperature. Relative humidity depends on temperature and the pressure of the system of interest. It requires less water vapor to attain high relative humidity at low temperatures; more water vapour is required to attain high relative humidity in warm or hot air.
silver is the color of the element mercury silver is the color of the element mercury Silvery.
Elemental or metallic mercury is a shiny, silver-white metal and is liquid at room temperature. When dropped, elemental mercury breaks into smaller droplets. At room temperature, exposed elemental mercury can evaporate to become an invisible, odorless toxic vapor.