elevation noun [C/U]. âº âheight above the âsurface of the âearth, or an âarea that is âhigher than the âsurrounding âland: [C] At âhigher elevations, the âair is âcolder. (Definition of elevation from the Cambridge Academic Content Dictionary Â© Cambridge University Press).
A dissolved gas is, simply enough, gas that has been dissolved into another material. This creates a solution, a mixture, where the gas is the solute, the minor component, and the other material, generally a liquid, is the solvent, the main component.
Noble gases are elements that have all possible electron positions in the outer, or valence, shell filled. This makes them chemically non-reactive. They are found in group 18 â¦ on the periodic table (far right edge) of elements (He, Ne, Ar, Kr, Xe, and Rn).he only other elements that are gases at room temperature are hydrogen, oxygen, nitrogen, and then fluorine and chlorine. Those last two elements are part of group 17, which is the group known as halogens.   A link to the Wikipedia periodic table is posted.