Pd. Chemical button 18 mm.

<div>   </div> <div> <strong> Atomic number <span class = "Apple-tab-span" style = "white-space: pre;"> </span>         46 </strong> </div> <div> <strong> Atomic mass <span class = "Apple-tab-span" style = "white-space: pre;"> </span>         106,42 </strong> </div> <div> <strong> Density, kg / m? <Span class = "Apple-tab-span" style = "white-space: pre;"> </span> & nbsp ;     12000 </strong> </div> <div> <strong> Temperature </strong></div> <div> <strong> melting, ° С <span class = "Apple-tab-span" style = "white- space: pre; "> </span>           1552 </strong> </div> <div>   </div> <div> Palladium is a silvery-white plastic transition metal. A noble metal of the platinum group. Discovered by the English chemist William Hyde Wollaston in 1803. Wollaston isolated it from platinum ore brought from South America. & Nbsp; </div> <div> Named for the asteroid Pallas, discovered by the German astronomer Olbers in 1802, that is, shortly before the discovery of palladium. In turn, the asteroid is named after Pallas Athena from ancient Greek mythology. & Nbsp; </div> <div>   </div>