Mercury :: essays research papers

hectogramMercury&8217s symbol is Hg, its atomic number is 80, its atomic mass is 200.59, its in group 12 and in period 6, and it also has two valence electrons. Its standard state is silver-tongued at 298K and it is the heaviest know elemental liquid. It has a silvery discolor color. It is named after the planet "Mercury" the origin of the symbol Hg is the Latin word "hydrargyrum" meaning "liquid silver". Mercury was known to ancient Chinese and Hindus before 2000 B.C. and was tack in tubes in Egyptian tombs dated from 1500 B.C. Mercury is the only metal liquid at workaday temperatures. Mercury is sometimes called quicksilver. It sometimes occurs free in nature and is found mainly in cinnabar ore which is HgS. Cinnabar ore is found in Spain and Italy. Mercury is a heavy, silvery-white metal which forms alloys easily with many metals like gold, silver, and tin. These alloys ar called amalgams. Its elbow room of amalgamating with gold is made use of the recovery of gold from its ores. Mercury is a bad conductor of heat and a okay conductor of electricity. The around important salts are mercuric chloride HgC12 which is a corrosive and violent poison. mercurous chloride Hg2Cl2 which apply to be apply in medicine. Mercury fulminate Hg(ONC)2 used as a detonator in explosives and mercuric sulfide HgS used as a high-grade paint pigment. Organic mercury compounds are important and risk of exposureous. Methyl mercury is a lethal pollutant found in rivers and lakes. Mercury is a virulent poison and is readily absorbed done the respiratory tract, the gastrointestinal tract, or through unbroken skin. It acts as a cumulative poison since there are few pathways available to the personify for its excretion. Since mercury is a very readily vaporizable element at a relatively low temperature, dangerous levels are readily deliver the goods in air. Air saturated with mercury vapor at 20C contains a concentration that exceeds the toxic lim it many times. The danger increases at higher temperatures. It is therefore important that mercury be handled with care.