In this life, Yoyo has invested heavily in introducing famous jewelry brands at home and abroad, and is committed to building Yoyo into a well-known brand in the jewelry retail field in Henan Province and even the whole country. In just a few years, Joyo Jewelry quickly opened nine self-operated stores in Henan, which are the jewelry brands that express warmth-I make jewelry, a century-old brand-Shanghai Old Temple Gold.
The main components of gold are as follows
The main component of gold is the chemical element gold.
Gold is a simple form of chemical element gold (chemical element symbol Au), which is a soft, golden yellow and corrosion-resistant precious metal. Gold is a rarer, more precious and more valuable metal.
The color of gold is golden yellow, which has a metallic texture and is not easy to decompose. Hardness 2-3, pure gold 19.3, melting point1064.4℃; Good ductility, can be pressed into thin foil, and has extremely high heat and thermal conductivity. The resistance of pure gold is 2.4p Pure gold has good chemical resistance and is the best electroplating material.
In Mendeleev's periodic table, the atomic number of gold is 79, that is, the nucleus of gold contains 79 protons, which are positively charged. At the same time, gold has good chemical stability because it conforms to the half-full law. In the metal market, gold and ruthenium, rhodium, palladium, osmium, iridium, platinum and other metals are collectively called precious metals.