Cr=CHROMIUM
Chromium is a hard, corrosion-resistant transition metal. One interesting fact about this element is that the 3+ oxidation state is essential for human nutrition, while the 6+ state (hexavalent chromium) is deadly toxic.
Chromium is a hard, corrosion-resistant transition metal. One interesting fact about this element is that the 3+ oxidation state is essential for human nutrition, while the 6+ state (hexavalent chromium) is deadly toxic.