Properties of gold

Properties of gold


Gold has a high value over the years, mainly due to its rarity. But gold owes much to its physical and aesthetic, and watered, and resistance to chemicals as well as the density. It is a beautiful yellow color, and luster breathtaking, and easily filled because of the watered them.

And is described by scholars as Lynn retractable; and to the possibility of withdrawal in the form of thin wire for easy styles, and conversion to thin plates. It also can be customized to any body required. After its formation, it retains Beraiqa, the ability to resist rust and other chemical changes caused by the air.


It should be the gold is mixed Pflz another if we are making it a solid object like a piece of jewelry for example. This is called the mixture alloy. And measured in carat gold bullion, and carat is equal to one of the twenty-four parts. Thus, the 24-carat gold is pure gold. And 18 carat consists of 18 parts of gold and 6 parts of another metal.


And pure gold melts at a temperature of 1,064,43 ° m. And boil at a temperature of 2,807 ° m, and belongs to the Group (1) periodic table of elements. The atomic weight is 196.967, and the atomic number is 79.


And intensity equivalent to 19.32 gm / cm § at the temperature of 20 ° C. And can be dissolved in a mixture of acid, chlorine, nitric named regia .. And also can be dissolved in solvents, alkaline or cyanide in the solution of hot iron chloride triangular, or a solution Altheosalafit or mercury or chlorine newborn.