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Yttrium, a rare earth metal, has a silver-grey color and metallic luster. It also appears highly crystalline. Yttrium displays chemical properties similar to those of rare earth elements. It dissolves in both mineral acids and alkalis, which are chemical opposites of one another.
1 For a liquid to dissolve a solid, the molecules of the liquid and solid must attract one another. 2  The bond between the oxygen and hydrogen atoms (OâH bond) in sugar (sucrose) gives the oxygen a slight negative charge and the hydrogen a slight positive charge.3  Sucrose is a polar molecule. The polar water molecules attract the negative and positive areas on the polar sucrose molecules which makes sucrose dissolve in water. 2  A nonpolar substance like mineral oil does not dissolve a polar substance like sucrose.