The natural gold consists of one stable isotope, Au-197, which is the only stable isotope. These are the artificially produced isotopes of gold. There are 35 isotopes of gold, with mass numbers ranging from 171 to 205. Recently, gold particles based anti-cancer drugs have been investigated. Gold is used for therapeutic purpose in a treatment called Chrysoteraphy, for relieving pain in rheumatoid arthritis. There is no ecotoxicity of gold as it is insoluble in water.
#INFORMATION ABOUT GOLD ELEMENT SKIN#
It may cause irritation in eye or skin and prolonged exposure can lead to irritation in lungs.
And is considered as a fairly dense metal with density of 19.32 g/cm 3. Gold has the ability to conduct heat and electricity with great efficiency. Twenty-four carats gold is considered as pure gold. The unit carat is used for the percent purity of gold, especially in jewellery. About 1 ounce of gold can be hammered or pressed into 300 square feet sheet. Gold is a soft metal and is usually used in alloyed form to provide strength and durability. Oceans, including the Northeast Pacific and Atlantic contain about 10–30 parts per quadrillion, that makes about 10–30 g/km 3 of gold in form of flakes or nuggets. The annual production of gold in the world is 2500 tons per year. The other countries where gold is being mined include USA, Canada and Russia. The biggest producer of gold is China from around two third of the gold (around 455 tons) in world is produced. The term “electrum” is used for gold ore that have silver content of more than 20%. Naturally, most of the gold present in the Earth’s crust is in combination with silver. Gold is found in association of pyrites deposits and from quarts and gravels. Gold also exists in the form of alloy, such as amalgam (with mercury) or with silver. It is also present in river beds as rock bound gold is released by erosion of rock by running water. Gold is widely present in the Earth’s crust (0.3 ppm by weight). The symbol of gold comes from a word of Latin origin, aurum, which is originated from Aurora, which is the goddess of morning glow. Geolo (Sanskrit origin meaning to shine) means yellow. The word gold has been originated from the word “geolo” used by Anglo-Saxon civilization that inhabited England in the 5 th century. Gold has been considered as perfect and precious metal since ancient times, and long relentless but in vain efforts have been made over centuries to transform various metals into gold, a concept known as alchemy.
Gold coins were made in the reign of King Croesus of Lydia (modern Turkey) (561-547 BC). Pure gold has been found from around 6000 years ago Israel kingdom. have been found to contain gold from civilization of 3800 to 2000 BC.
And gold made items, such as masks, graves etc. The Egyptians in around 2000 BC started mining of gold. Gold is the metal of prehistoric times and it was collected from water streams in form of particles. It is unreactive and is highly resistant to corrosion which makes it favorable for wide range of medicinal, ornamental and structural use. Gold is a precious metal which has been in human use since 2000 BC.
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