The term 'White Element' can refer to two different elements: Indium and SILVER. Indium is a chemical element with the symbol In and atomic number 49. It is a post-transition metal that makes up 0.21 parts per million of the Earth's crust. SILVER is a chemical element with the symbol Ag and atomic number 47. It is a transition metal that is found in the Earth's crust at a concentration of only 0.08 parts per million.