Yttrium, is a chemical element that has the symbol Y and atomic number 39. A silvery metallic transition metal, yttrium is common in rare-earth minerals and two of its compounds are used to make the red color phosphors in cathode ray tube displays, such as those used for televisions. Notable characteristics Yttrium is a silver-metallic, lustrous rare earth metal that's relatively stable in air, strongly resembles scandium in appearance, and chemically resembles the lanthanides, and can appe… (More on Yttrium)