Chemistry Project/ Diana Alcaraz/ Reynolds 4th prd/ Mercury-element (:

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Chemistry Project/ Diana Alcaraz/ Reynolds 4th prd/ Mercury-element (:

PropertiesChemical:1. most stable form: elementar mercury2.thermally unstable both forms Hg+1, Hg+2, decompose to elemental mercury3.ionic forms: Hg22+, Hg2+Physical:1. Very shiny2. boiling point: 357oC / 675oF / 630K 3. electrical conductivity: 0.0104 X 106 / cm Ohm

Meaning of element: named after the planet "Mercury" (the origin of the symbol Hg is the Latin word "hydrargyrum" meaning "liquid silver")

Mercury *Hg*


Mercury was known to ancient Chinese and Hindus before 2000 BC and was found in tubes in Egyptian tombs dated from 1500 BC It was used to forma amalgams of other metals around 500 BC. The Greeks used mercury in ointments and the Romans used it, unfortunately for those using it, in cosmetics. Mercury is used in laboratories for making thermometers, barometers, diffusion pumps, and many other instruments. It is used for mercury switches and other electrical apparatus. It is used as an electrode in some types of electrolysis and for making batteries (mercury cells).Mercury metal, which is a silver-gray liquid, is harmful to humans when it is exposed into the air and consequently breathed into the lungs. Methylmercury may be taken into the body by eating certain saltwater and freshwater fish, especially larger fish at the top of the food chain, such as shark, swordfish, large mouth bass, and chain pickerel.Inorganic mercury compounds can be found in batteries, over the counter drugs, ointments, nasal sprays, and some herbal medicines. These compounds may be harmful if breathed or swallowed.Phenylmercury can be found in latex paints (made before 1991), exterior and oil based paints, caulks, eye area cosmetics, and toiletries. Phenylmercury can be breathed in vapor form, passed through the skin, or swallowed.

Compounds formed:The most important salts are mercuric chloride HgC12 (corrosive sublimate - a violent poison), mercurous chloride Hg2Cl2 (calomel, occasionally still used in medicine), mercury fulminate (Hg(ONC)2, a detonator used in explosives), and mercuric sulphide (HgS, vermillion, a high-grade paint pigment).

Interesting Fact:The term "mad as a hatter" comes from hat makers who went crazy breathing in mercury vapors from chemicals they used in making hats.

By: Diana Alcaraz



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