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and for this purpose
Predictions vary on whether solid copernicium would be a metal
For anyone wanting to organize their cubes
5" x 8" x 1
a history buff
Iridium Element Cube Hazmat and for this purposeIridium's atomic number is 77 and its symbol is Ir. A very hard, brittle, silvery white transition metal of the platinum group, iridium is considered to be the second densest naturally occurring metal (after osmium). It is the most corrosion resistant metal, even at temperatures as high as 2000 C. Named iridium after the Greek goddess Iris, personification of the rainbow, because of the striking and diverse colors of its salts. Iridium is found in
