gold
Gold is one of the most precious metal chemical elements, symbolized by the symbol Au and its atomic number in the periodic table is equal to 79, and its mass is equal to 196.96657 and boils at a temperature of 2.970 Celsius, a bright yellow color, found in nature in the form of small granules, The rocks of river bottoms, or the shape of veins in the ground, and most characteristic of the element of gold is softness and lack of corrosion and softness as it is retractable and forming, which facilitated and increased its uses in several areas.
Be gold
The gold element consists of a collision of two stars of neutron stars consisting of the remains of a large, small, mass-dense starburst filled with neutrons that can collide the formation of heavy metals such as lead, gold and platinum with high energy. The discovery was made by a team of Harvard Smithsonian physicists Astronomers after monitoring an explosion of gamma rays in a galaxy from the ground 3.9 billion light-years away, scientists estimated how much gold produced by this explosion about ten times as much as the mass of the moon.
Components of gold
jewelry
Gold is mixed with some metals such as zinc, nickel and copper with different proportions to increase its loneliness and be able to form and make jewelry from it; because gold is especially rough gold 24 carats hard and difficult to form.
The most important uses of the gold element
- Gold is used in the field of medicine, especially in the field of dentistry is resistant to corrosion in the mouth, and uses the gold element solution in the treatment of osteoporosis and rheumatism.
- There is a type of gold which is the No. 198 radioactive gold used to treat types of cancer.
- It is used on high-end discs as a reflective layer.
- Is a good source of investment. It is stored in the form of bullion or coins to hedge currency depreciation and inflation.
- Gold leaves are used to cover some sweets, food and drinks as decorative.
- Contain the E175 make it enter into some food.
- The yellow gold is mixed with copper, zinc and silver in different proportions, or mixed with white gold with tin or palladium in the jewelry industry, which is decorated with women, and there are different gauges of gold depend on the amount of gold in the alloy. The smaller the amount of gold the color of the alloy to the plateau, corresponds to a purity of 1000, the 21 caliber corresponds to a purity of 875, while the 18 caliber corresponds to a purity of 750.