Population-based biomonitoring also showed that mercury concentration levels are higher in consumers of seafood and fish meals.. Volcanic eruptions can increase the atmospheric source by 4–6 times. Fish and shellfish have a natural tendency to concentrate mercury in their bodies, often in the form of methylmercury, a highly toxic organic compound of mercury. However, their respective core sizes allowed them to grab helium and hydrogen out of the gas cloud from the condensing sun and as a result, formed and expelled most of the gas away. induces disproportionation to Hg2+ and elemental mercury. It comes from hydrargyrum, a Latinized form of the Greek word ὑδράργυρος (hydrargyros), which is a compound word meaning "water-silver" (from ὑδρ- hydr-, the root of ὕδωρ, "water," and ἄργυρος argyros "silver") – since it is liquid like water and shiny like silver. All four mercuric halides are known.  These concentrations are far higher than those shown in salt marsh river creek sediments of New Jersey and mangroves of Southern China which exhibit low mercury concentrations of about 0.2 mg/kg.. If scientists would like to study the core of a gas giant roughly the size of Neptune or Uranus, they need look no further than Mercury. The impact scaring on the surface gives testament to Mercury's gas free past. Chlorine is produced from sodium chloride (common salt, NaCl) using electrolysis to separate the metallic sodium from the chlorine gas. Mercury is the closest planet to the Sun and due to its proximity it is not easily seen except during twilight. When it formed, its core was a liquid iron dynamo. Mercury was once used as a gun barrel bore cleaner. , Mercury is extracted by heating cinnabar in a current of air and condensing the vapor. Afterwards, fine sulfur, zinc, or some other powder that readily forms an amalgam (alloy) with mercury at ordinary temperatures is sprinkled over the area before itself being collected and properly disposed of. Mercury is the closest planet to the sun.  Many of the industrial mercury releases of the 20th century came from this process, although modern plants claimed to be safe in this regard.  Thiomersal is metabolized to ethyl mercury. The first edition of the Merck's Manual featured many mercuric compounds such as: Mercury is an ingredient in dental amalgams. , Norway enacted a total ban on the use of mercury in the manufacturing and import/export of mercury products, effective 1 January 2008. , Recent atmospheric mercury contamination in outdoor urban air was measured at 0.01–0.02 µg/m3.  Khumarawayh ibn Ahmad ibn Tulun, the second Tulunid ruler of Egypt (r. 884–896), known for his extravagance and profligacy, reportedly built a basin filled with mercury, on which he would lie on top of air-filled cushions and be rocked to sleep. For every two orbits of the Sun, Mercury completes three rotations about its axis and up until 1965 it was thought that the same side of Mercury constantly faced the Sun. Mercury’s heavy atmospheric pressure condensed the planet’s core and created its crumpled surface with ridges that extend hundreds of miles. Unlike its lighter neighbors, cadmium and zinc, mercury usually forms simple stable compounds with metal-metal bonds. It reacts with chlorine to give mercuric chloride, which resists further oxidation. For this reason, mercury is not allowed aboard an aircraft under most circumstances because of the risk of it forming an amalgam with exposed aluminium parts in the aircraft.. It is used in some thermometers, especially ones which are used to measure high temperatures. Most astronomers consider it a planet, although there was a proposal a few years ago to reclassify it to a minor planet. Mercury poisoning can result from exposure to water-soluble forms of mercury (such as mercuric chloride or methylmercury), by inhalation of mercury vapor, or by ingesting any form of mercury. Thermometers and sphygmomanometers containing mercury were invented in the early 18th and late 19th centuries, respectively. Mercury thermometers are still widely used for certain scientific applications because of their greater accuracy and working range. Since the amalgam destroys the aluminium oxide layer which protects metallic aluminium from oxidizing in-depth (as in iron rusting), even small amounts of mercury can seriously corrode aluminium. Choose Mercury as your Gas Supplier and get Natural Gas for your home or business and enjoy great Energy deals when you are a Gas and Electricity customer  Mercury compounds are found in some over-the-counter drugs, including topical antiseptics, stimulant laxatives, diaper-rash ointment, eye drops, and nasal sprays. In 2008, Denmark also banned dental mercury amalgam, except for molar masticating surface fillings in permanent (adult) teeth. Additionally, the Mercury-Containing and Rechargeable Battery Management Act, passed in 1996, phases out the use of mercury in batteries, and provides for the efficient and cost-effective disposal of many types of used batteries. Usually the salt is dissolved in water to produce a brine. ", The ancient Greeks used cinnabar (mercury sulfide) in ointments; the ancient Egyptians and the Romans used it in cosmetics. Some facial creams contain dangerous levels of mercury. 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