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Mercury: Found In Different Chemical Forms

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Mercury, the only metal which can be found in liquid form at room temperature, is a heavy, silvery-white d-block element. Mercury exists in different chemical forms: elemental (or metallic), inorganic, and organic. Methylmercury, the most predominant form of organic mercury, is the form that poses a risk through fish consumption. Another organic mercury compound, ethylmercury, is a metabolite from thimerosal. Since the 1930’s, thimerosal, which is approximately 50% mercury by weight, has been used as a preservative to prevent bacterial and fungal contamination in vaccines. It wasn’t until the late 1990’s that concerns were raised about exposure to ethylmercury, especially for infants who receive many vaccinations within their first year of …show more content…

One of its most unique characteristics is that it is the only metal that is a liquid at standard conditions for temperature and pressure. Its chemical symbol, Hg, comes from the Latinized form of a Greek word meaning water-silver. Mercury is an extremely rare element in the Earth's crust, having an average crustal abundance by mass of only 0.08 parts per million. It is found mainly in cinnabar ore (HgS) in Spain and Italy. This mercury ore is bright scarlet to brick-red in color due to the naturally occurring mineral pigment, vermilion. Mercury can be extracted from cinnabar in a current of air and condensing the vapor. The equation for this extraction …show more content…

Elemental mercury, which is a liquid at room temperature is less toxic than inorganic or organic bound mercury. However, it can easily evaporate. Breathing in large amounts can cause harm. Inorganic mercury compounds are formed when mercury combines with elements such as chlorine, sulfur, or oxygen. Mercury salts can cause toxic effects if they are ingested. The high toxicity of mercuric ions can be explained by the high affinity to sulfhydryl groups of amino acids, which are building blocks for enzymes. In organic mercury compounds, mercury is covalently bound to carbon. Organic mercury is the most dangerous form of mercury to human health. The most common organic mercury compound in the environment is methylmercury which bioaccumulates in fish and can be harmful if

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