Chromium is an element on the Periodic Table of the Elements. It is number 24, with an Atomic symbol of Cr. It is a Transition metal. It is a steely-gray color. It is odorless, tasteless, and malleable. Research indicated that steel can be made more resistant to oxidation and corrosion. By smelting Chromium with nickel, you create an alloy, known commonly as stainless steel. Hexavalent Chromium (Cr(VI)) is chromium in the sixth oxidation state, and is a known carcinogen.