Gold is a comparatively dense, shiny, yellow metal. As an element, gold is quite resistant to corrosion (by oxygen, but also many other chemicals). “Gold is a chemical element with the symbol Au and an atomic number of 79. Gold is a dense, soft, shiny metal and the most malleable and ductile metal known.” In ancient times the value of gold had already been discovered. People took gold to make jewellery and currency. It is a symbol of wealth, beauty and heritage carrying memories and cultures. However, besides these, gold also makes significant contributions to a wide range of technologies. Due to its physical features as corrosion resistance and highly malleable and ductile, gold is being applied in space exploration, nanoparticle technology, and medicine. Moreover it is also used as the bonding wire at the core of an iPhone.
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