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The nature of the gold

2019-12-03 10:37

Introduction:Gold is an IB element in the sixth period of the periodic table, with atomic number 79 and relative atomic mass 196.967 Pure gold is golden and its color varies with the type and quantity of magazinesin it. For example, silver and platinum

       Gold is an IB element in the sixth period of the periodic table, with atomic number 79 and relative atomic mass 196.967 Pure gold is golden and its color varies with the type and quantity of magazinesin it. For example, silver and platinum can make gold lighter, while copper can make gold darker.When gold is crushed into powder or ground into gold foil, the color may be cyan, red, purple or even dark brown to black. 
       in all the metals, gold has the best ductility. A gram of gold  can be rolled into gold foil with a thickness of 0.23x10-3 mm by the length of more than 3,500 meters.however, when gold contains lead, bismuth, telluride, cadmium, antimony, arsenic, tin and other impurities, its mechanical properties decrease significantly.Gold containing 0.05% bismuth can even be crushed by hand.
     Gold density varies with temperature, and gold density at room temperature is 19.26-19.37 g/cm.The gold ingot contains a certain amount of gas, and its density decreases slightly, while the density of gold increases after rolling.


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