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.
Mercury also possesses an extremely thin atmosphere that is made up of hydrogen, helium, oxygen, sodium, calcium, potassium and other elements. This atmosphere is so tenuous that astronomers refer to it as an exosphere, one which neither absorbs nor reflects light. So when we look at Mercury, regardless of whether it is from the surface or space, we get a clear view of its surface. And what we have seen is a dark gray, rocky planet.