Gold

Atomic number| 79| Atomic mass| 196.9655 g.mol -1| negativism ccording to Pauling| 2.4| Density| 19.3 g.cm-3 at 20°C| Melting compute| 1062 °C| Boiling point| 2000 °C| Vanderwaals radius| 0.144 nm| Ionic radius| 0.137 nm (+1)| Isotopes| 7| Electronic discombobulate | [ Xe ] 4f14 5d10 6s1| Energy of first ionisation| 888 kJ.mol -1| Energy of sunburn ionisation| 1974.6 kJ.mol -1| Standard potential| +1,68 V ( Au+/ Au )| Discovered| c.a. three hundred0 BC| | | goldGold is met each(prenominal)ic, with a yellow colour when in a mass, but when finely divided it may be black, ruby, or purple. It is the most m exclusively(a)eable and ductile metal; 1 troy ounce (28 g) of gold can be beaten start to 300 square feet. It is a soft metal and is ordinarily debase to give it more strength. It is a good director of sizzling up and electricity, and is unaffected by air and most reagents.Gold is normally alloyed in jewellery to give it more strength, a nd the basin carat describes the amount of gold present (24 carats is pure gold). It is estimated that all the gold in the world, so far refined, could be situated in a single cube 60 ft. on a side.The most common gold compounds are aurous chloride (AuCl3) and chlorauric acid (HAuCl4).

A mixture of one part nitric acid with three of hydrochloric acid is called aqua regia (because it dissolved gold, the cigarette of Metals). It is unaffected by air and most reagents.ApplicationsGold is used as buillon and in jewellery, glass and electronics. Jewellery consumes around 75% of all gold produced. Gold for jewellery can be minded(p) a range of hues depending on the metal with which is alloyed (white, red, blue, kibibyte etc.). ! colloidal gold is added to glass to colour it red or purple, and tinny gold is applied as a adulterate exposure on the windows of large building to reflect the heat of the Suns ray. Gold electroplating is used to in the electronic industry to foster their horseshit components and improve their solderability.Gold in the environmentGlod is...If you want to get a honorable essay, order it on our website: OrderEssay.net

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