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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.
A base dissolves to make an alkali. Added:   Statement: All alkali are bases but not all bases are alkaliAlkali is a basic, ionic salt of an alkali metal or alkaline â¦ earth metal element. Alkalis are best known for being bases that dissolve in water. base dissolves to make an alkali. Added:   Statement: All alkali are bases but not all bases are alkaliAlkali is a basic, ionic salt of an alkali metal or alkaline â¦ earth metal element. Alkalis are best known for being bases that dissolve in water.