Gold has been used to make jewelry as early as 4000 B.C. According to the National Mining Association, humans have been decorating themselves since then. Gold also has appeared throughout the ancient world, from the Middle East to the Eastern Europe to the tombs of Egyptian Pharaohs.
Gold Is A Transition Metal
Because transition metal can bond with other element using their outermost shell of electrons and outermost two shells, they are considered unique. The large number of electron that transition metals have will interfere with the common orderly sorting of electrons into shells.
Most gold jewelry is not made of pure gold. And the amount of gold in certain jewelry is measured on the karat scale. The word “karat” came from the carob seeds, which were used in ancient Asian bazaars to balance scales measuring the weight of gold.
Gold And The Health Industry
Gold is now used in medicine. Gold isotopes are being injected directly into the tumor’s site to destroy tumor cells without hurting other body cells.
In 2012, there were studies linking gold nanoparticles with a compound found in leaves in order to treat prostate cancers but such method has yet to be tested on human beings. According to an online publication of the National Cancer Institute, TNF-alpha drugs linked to gold nanoparticles can treat tumors successfully since the drugs directly hit their targets.
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