Short answers, pulled from the story.
Johann Gottlob Lehmann found the mineral in 1761 while Louis Nicolas Vauquelin officially discovered metallic chromium by 1797. Vauquelin produced chromium trioxide from crocoite ore samples received in 1794 before isolating the metal through heating.
Crocoite has a chemical formula of PbCrO4 and derives its name from the Greek word chrōma meaning color. The element chromium takes its name because many compounds display intense colors ranging from yellow to green to red.
South Africa provided about two-fifths of global production while Kazakhstan contributed one-third in 2013. India, Russia, and Turkey also served as substantial producers alongside these leading nations.
Women ages fourteen through fifty need twenty-five micrograms daily according to U.S. National Academy of Medicine estimates. Men require thirty-five micrograms per day from age fourteen to fifty under the same Adequate Intake guidelines.
U.S. road engineers avoided chromium in yellow paint because officials feared it might become critical during emergencies. They made diplomatic efforts to keep chromium out of Nazi hands since they considered it essential for the German war industry.