An overview of mercury symbol hg
Where is mercury found
Handbook of Chemistry and Physics. Preeminent is mercury II sulfide , HgS, which occurs in nature as the ore cinnabar and is the brilliant pigment vermillion. Mercury is the only element to retain its alchemical name as its modern common name. Petersburg, Russia obtained solid mercury by freezing a mercury thermometer in a mixture of snow and concentrated nitric acid. These generally rely on the fact that cinnabar is readily soluble in solutions of sodium hypochlorite or sulfide, from which the mercury can be recovered by precipitation with zinc or aluminum or by electrolysis. What is Mercury? Treatment of Hg I compounds complexation with strong ligands such as sulfide, cyanide, etc.
How does mercury affect human health? The symbol Hg is from the Greek words hydor and argyros, meaning "water-silver", because it is a liquid like water and has silvery metallic sheen.
Geological Survey. Mercury is occasionally found free in nature but usually occurs as the red sulfide ore, called cinnabar, or vermillion.
Natural mercury is a mixture of seven stable isotopes: Hg 0. Mercury is sometimes called quicksilver. Mercury is extracted from cinnabar by roasting it in air, followed by condensation of the mercury vapour. Like ZnS, HgS crystallizes in two forms , the reddish cubic form and the black zinc blende form. Mercury exists in a number of different forms: elemental mercury inorganic mercury compounds organic mercury compounds. Amazement not just at the fact that mercury was so dense it could support a man, but more pressingly that the man in question was very likely giving himself a lethal dose of mercury poisoning in one fatal pose. The longer people breathe the contaminated air, the greater the risk to their health. High exposures to mercury compounds can damage the gastrointestinal tract, the nervous system, and the kidneys. What are the sources of exposure to other forms of mercury and what are their health effects? All four mercuric halides are known. Mercury readily combines with aluminium to form a mercury-aluminium amalgam when the two pure metals come into contact.
Methylmercurya generic term for compounds with the formula CH3HgX, is a dangerous family of compounds that are often found in polluted water. The metal is relatively stable in dry air, but in moist air tarnishes slowly to form a gray oxide coating.
Mercury element facts
Because of the high toxicity of mercury, both the mining of cinnabar and refining for mercury are hazardous and historic causes of mercury poisoning. The amount of mercury deposited in a given area depends on how much mercury is released from local, regional, national, and international sources. If heated, it is a colorless, odorless gas. Being a soft metal , mercury forms very stable derivatives with the heavier chalcogens. Sources Lide, D. This provided strong evidence that mercury had properties similar to other metals. Who knew? Continue Reading. The metal is relatively stable in dry air, but in moist air tarnishes slowly to form a gray oxide coating. Hauben, The derivations of the names of the elements, J. During poisoning outbreaks some mothers gave birth to infants with severe disabilities and it was proved that the developing nervous system of the foetus and young children is more vulnerable to methylmercury than the developed adult nervous system. It is a rather poor conductor of heat if compared with other metals but it is a fair conductor of electricity. Mercury that remains in the air for prolonged periods of time and travels across continents is said to be in the "global cycle. High exposures to mercury compounds can damage the gastrointestinal tract, the nervous system, and the kidneys.
Mercury is the only metal that is liquid at room temperature. Iron is an exception, and iron flasks have traditionally been used to trade mercury.
An overview of mercury symbol hg
Another example is mercurous chloride Hg2Cl2 , also known as calomel — an antiseptic used to kill bacteria, according to the Jefferson Lab. Human activities, however, are responsible for much of the mercury that is released into the environment. Applications The bulb of a mercury-in-glass thermometer Mercury is used primarily for the manufacture of industrial chemicals or for electrical and electronic applications. At high exposures, through inhalation, elemental mercury vapors can produce severe lung, gastrointestinal, and nervous system damage. Mercury is a naturally occurring element that can be found throughout the environment. This week, we're exploring the link between mad hatters, mascara, the emperors of China and fishing floats; a strange combination you might say, but probably not as strange as this! It is a mild electrical conductor. Additional resources Check you this cool video that shows how gold dissolves into mercury. From this point on, the hazards of mercury were well documented; but despite its toxicity, it continued to find many uses in everyday applications throughout the last century. Mercury is a very toxic element.
Cinnabar sometimes alters to native mercury in the oxidized zone of mercury deposits. Mercury was used to extract silver from the lucrative mines in New Spain and Peru. Excessive exposure to inorganic and organic mercury compounds can result from misuse or overuse of mercury-containing products.
Sources Lide, D. It is therefore important that mercury be handled with care.
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