Density of gold is 19.3 g/cm^3, and density of copper is 9.3 g/cm^3
Assume a gold medal and a copper medal have the same volume, then it is apparent that a gold medal, because of its higher density, is heavier than a copper medal.
金(Gold)是一種化學元素,化學符號是Au,原子序數是79。金是一種廣受歡迎的貴金屬,在幾世紀以來都被用作貨幣、保值物(store of value)及珠寶。在自然界中,金出現在岩石中的金塊或金粒、地下礦脈及沖積層中。金亦是貨幣金屬之一。金在室溫下為固體、密度高、柔軟、光亮,其延展性及延性均是已知金屬中最高的。純金的亮黃色在傳統上被認為具有吸引力。