Other+Environmental+Poisons

Well this is my page on Poisonous substances from the Periodic Table of Elements. I just Talk About Arsenic, Mercury, and Lead, but there are dozens of poisonous chemicals like plutonium, uranium, etc.

__**Arsenic**__
 * [[image:http://www.galleries.com/minerals/elements/arsenic/arsenic.jpg width="192" height="144" align="right"]] What: ** Arsenic is the 33rd chemical element in the periodic table. It is very poisonous. This yellow, and sometimes black or gray, chemical is used in pesticides.
 * Who/When**: Discovered by Albertus Magnus in 1250.
 * Where**: Arsenic is found naturally in small concentrations in the soil. All microorganisms in the world release about 20 tonnes (or 20,000 kilograms) of arsenic each year but humans produce 80 tonnes, from burning fossil fuels.
 * Fast Facts:**
 * Humans take in about .01 mg of arsenic a day.
 * World production of arsenic is around 50.000 tonnes per year. China is the chief exporting country, followed by Chile and Mexico.
 * Arsenic is seen as a dangerous chemical, and it is, but it is also used to preserve wood (since it kills living things that would try to harm it), for cancer treatment and painkillers.


 * __Mercury__**

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 * [[image:http://blog.deborahblum.com/wp-content/uploads/2010/03/mercury_drops_large.jpg width="200" height="191" align="left" caption="shiny!"]]What:** Mercury is the 80th chemical element in the periodic table. Also known as quicksilver, this heavy silvery material is the only common metal to be in liquid form at normal temperatures. It is a poor heat conductor and is used in thermometers and batteries. Mercury makes useful compounds with other elements. Mercuric chloride is a very poisonous salt and was once used to disinfect wounds. Mercurous chloride, also called calomel, is an antiseptic used to kill bacteria. Mercuric sulfide is used to make a red paint color called vermilion. Mercuric oxide is used to make mercury batteries. Also, the first cameras were made with the help of mercury.
 * Who/When:** It was discovered in ancient times.
 * Where: [[image:http://cltad.arts.ac.uk/groups/camberwellmateriallibrary/wiki/f347a/images/5bd87.jpg width="187" height="151" align="right" caption="lead"]] ** In nature, mercury is found in something called cinnabar ore. There are about 600 tonnes of minable cinnabar ore. Mercury is poisonous and can enter the body through the respiratory tract, the digestive tract or directly through the skin. It builds up in the body, eventually causing death or severe sickness.

What:** Lead is the 82nd chemical in the periodic table. It used to be used in pencils but that got dangerous... You could kill someone with a pencil.... Now graphite is used in pencils instead, and lead in automobile batteries, wire coating, and X-Ray machines. Home
 * __Lead__
 * Who/When:** Lead has been known since ancient times.
 * Where:** Lead is found in some ores called galena, anglesite, cerussite and minum. Also, lead makes up .0013 percent of the earth's crust. It is dangerous since it damages nerve connections and causes brain /blood disorders.