Cube. Chromium.

<div>   </div> <div> <strong> Atomic number     <span class = "Apple-tab-span" style = "white-space: pre;"> </span>24</strong></div> <div> <strong> Atomic mass <span class = " Apple-tab-span "style =" white-space: pre; "> </span>       51,996 </strong> </div> <div> <strong> Density, kg / m? <span class = "Apple-tab-span" style = "white-space: pre;"> </span> & nbsp ;   7190 </strong> </div> <div> <strong> Temperature </strong></div> <div> <strong> melting temperature, ° С       <span class = "Apple-tab-span" style = "white-space: pre;"> </span>1856</strong></div> <div>   </div> <div> Chrome - bluish-white hard metal. Chromium is sometimes referred to as ferrous metals. Chromium was discovered in 1797 by L. N. Vauquelin in the mineral crocoite, a natural lead chromate. Chrome got its name from the Greek word chroma - color, paint (because of the variety of colors of its compounds). Independently of Vauquelin, Chrome was discovered in crocoite in 1798 by the German scientist M. G. Klaproth. </div> <div> The largest chromium deposits are located in South Africa, Kazakhstan, Russia, Zimbabwe, Madagascar. There are also deposits in Turkey, India, Armenia, Brazil, the Philippines. </div>