The ability of these materials to isolate “aristocratic atoms” is essential to the function of SACs (“S-A-C’s”). Khoobiar reported that a material serving this role formed a non-stoichiometric (“non-STOY-kee-oh-metric”) blue compound in the first documented case of spillover. Incipient wetness is a method of impregnating these materials that relies on surface tension to achieve high dispersion. (10[1])These materials may be immersed in cyanide to transform expensive clusters into single atoms. (-5[1])Though theoretically inert, acidic examples of these materials can stabilize preferred oxidation states and greatly increase the surface area (10[1])available for adsorption (10[1])(“ADD-sorption”). Palladium (-5[1])is often placed (-5[1])“on” (10[1]-5[2])examples (-5[1])of these materials (10[1]-5[1])like alumina, (10[1])carbon, (10[1])or calcium carbonate. (10[1])For 10 points, name these (10[1])materials that mount the active metal (10[2])in many solid heterogeneous catalysts. (10[1])■END■ (10[2]0[7])