Why are rubies red and emeralds green? Their colors come from the same metal in their atomic structure
The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But ...
Royal Society of Chemistry5y
Chemistry in its element: chromium
dark red chromium(VI) oxide, orange-red lead chromate, bright yellow sodium chromate, brilliant chrome green (that's chrome(III) oxide), light blue chromium(II) chloride, and violet anhydrous chromium ...
Nature29d
Glow Phenomenon of Chromium Oxide
CHROMIUM oxide is used extensively as a catalyst, both as the pure oxide and as an essential component of various multicomponent systems. The unsupported chromium oxide gel usually undergoes a ...