You must be at least 16 years of age in order to attend! The Navy League of the United States is proud to host the U.S. Navyâs official 241st Birthday Ball in the National Capital Region. The ball will be held at the Gaylord National Resort & Convention Center, in National Harbor, MD.
For other uses, see Chromium (disambiguation). Chromium is a chemical element with symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-grey, lustrous, hard and brittle metal which takes a high polish, resists tarnishing, and has a high melting point.
Chromium is pronounced as KROH-mee-em. History and Uses: Chromium was discovered by Louis-Nicholas Vauquelin while experimenting with a material known as Siberian red lead, also known as the mineral crocoite (PbCrO 4), in 1797.He produced chromium oxide (CrO 3) by mixing crocoite with hydrochloric acid (HCl).hromium can be polished to form a very shiny surface and is often plated to other metals to form a protective and attractive covering. Chromium is added to steel to harden it and to form stainless steel, a steel alloy that contains at least 10% chromium.