為何足金都只是9999
回答 (3)
2010-01-16 4:53 am
Pure gold (100% gold) is too soft so it may wear/damage away easily.
When mixed with another metal in small quantity, such as silver, platinum or even copper or zinc, forming a gold alloy makes it much harder wearing. Gold alloy is also easy to work with and to shape.
When mixed with another metal in small quantity, such as silver, platinum or even copper or zinc, forming a gold alloy makes it much harder wearing. Gold alloy is also easy to work with and to shape.
2010-01-16 3:05 am
因為空氣會痴上舊金面頭,結果形成雜質
2010-01-15 8:42 pm
現實世界中，很難有百分百的完美東西，即使是鑽石，也有雜質。
蒸餾水，也會有一丁點的污染物。
完美，只存在於概念中。
2010-01-15 22:12:20 補充：
physics8801,
千足金是999，並不是因為太軟所以不製造100%純金，而是真的造不來。
蒸餾水，也會有一丁點的污染物。
完美，只存在於概念中。
2010-01-15 22:12:20 補充：
physics8801,
千足金是999，並不是因為太軟所以不製造100%純金，而是真的造不來。
收錄日期: 2021-04-29 17:33:25
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https://hk.answers.yahoo.com/question/index?qid=20100115000051KK00225