About Gold :-
Gold is a shiny, malleable and ductile metal dense and soft. It is a chemical element with the symbol Au and atomic number 79.
It has a bright yellow color and luster traditionally considered the most beautiful and attractive, which it maintains without oxidizing in air or water. Chemically, gold is a transition metal. It is one of the least reactive solid chemical elements under standard conditions.
The metal is so often in free elemental form, as nuggets or grains in rocks, in veins and in alluvial deposits. Less commonly, it occurs in minerals as gold compounds.
Gold resists attacks by individual acids, but it can be dissolved by the aqua regia, so named because it dissolves gold. Gold also dissolves in alkaline solutions of cyanide, which have been used in the mining industry. It dissolves in mercury, forming amalgam alloys, is insoluble in nitric acid, which dissolves silver and base metals, a property that has long been used to confirm the presence of gold in the articles, giving rise to the term the acid test.
Gold is a shiny, malleable and ductile metal dense and soft. It is a chemical element with the symbol Au and atomic number 79.
It has a bright yellow color and luster traditionally considered the most beautiful and attractive, which it maintains without oxidizing in air or water. Chemically, gold is a transition metal. It is one of the least reactive solid chemical elements under standard conditions.
The metal is so often in free elemental form, as nuggets or grains in rocks, in veins and in alluvial deposits. Less commonly, it occurs in minerals as gold compounds.
Gold resists attacks by individual acids, but it can be dissolved by the aqua regia, so named because it dissolves gold. Gold also dissolves in alkaline solutions of cyanide, which have been used in the mining industry. It dissolves in mercury, forming amalgam alloys, is insoluble in nitric acid, which dissolves silver and base metals, a property that has long been used to confirm the presence of gold in the articles, giving rise to the term the acid test.
