History Channel Documentaries

Secret World of Gold (2013x10)

Ημερομηνία προβολής: Ιούλ 20, 2013

GOLD is a chemical element with the symbol Au and atomic number 79. It is a dense, soft, malleable, and ductile metal with a bright yellow color and luster that is considered attractive, which is maintained without tarnishing in air or water.