Since ancient times, gold (Lat. Aurum) has been one of the most valuable and sought-after metals due to its attractive aesthetic properties and durability. The chemical and physical properties of gold (chemical symbol Au) are indeed unique. The atomic number of this metal is 79, and its atomic weight is 196.96. The melting point of gold is 1063°C, and the boiling point is 2966°C. Although pure gold (999 fineness) is known for its bright yellow colour, if there are larger amounts of impurities from other elements, gold can also take on white, greenish-yellow, or even reddish shades. The most common elemental impurities found in gold include silver, copper, palladium, and bismuth.
Gold is one of the densest metals in the world. It is an excellent conductor of electricity and heat and is highly resistant to corrosion. Refined gold is easy to shape and process. Due to these physical properties, gold is widely used in the electronics industry. As a metal capable of transmitting precise low-power electric currents, it is widely used in the production of contact wires and microchips for telephones, computers, cameras, and similar electronic devices.
Gold can also be found in household appliances such as washing machines and air conditioners. Larger quantities of this precious metal are present in various medical devices, including pacemakers, prostheses and hearing aids. Recycled and newly extracted gold can be successfully used in the production of jewellery and investment bars.
Sources:
https://www.britannica.com/science/gold-chemical-element
https://geology.com/minerals/gold/uses-of-gold.shtml
https://lt.wikipedia.org/wiki/Auksas
https://www.thenaturalsapphirecompany.com/education/additional-precious-metals-information/gold-in-industry/
