Magnesium is a chemical element with the symbol Mg, the atomic number 12, and an atomic mass of 24.31.
Magnesium is a light, silvery-white, and fairly tough metal.
Magnesium tarnishes slightly in air, and finely divided magnesium readily ignites upon heating in air and burns with a dazzling white flame. The substance may spontaneously ignite on contact with air or moisture producing irritating or toxic fumes. Reacts violently with strong oxidants. Reacts violently with many substances causing fire and explosion hazard.
Magnesium is useful in protection against heart muscle disease and, in conjunction with vitamin B-6, aids in the removal of kidney stones.
Magnesium compounds are used as refractory material in furnace linings for producing metals (iron and steel, nonferrous metals), glass, and cement.
In 1618 a farmer at Epsom in England attempted to give his cows water from a well. This they refused to drink because of the water's bitter taste. However the farmer noticed that the water seemed to heal scratches and rashes. The fame of Epsom salts spread. Eventually they were recognized to be hydrated magnesium sulphate, MgSO4. Sir Humphry Davy electrolytically isolated pure magnesium metal in 1808 from a mix of magnesia and HgO, and A. A. B. Bussy prepared it in coherent form in 1831. Davy's first suggestion for a name was magnium, but the name magnesium is now used.
High concentrations of magnesium are contained in nuts, unmilled grains, dark-green leafy vegetables, legumes such as peas and beans, and fruit. Magnesium is thus readily available in foods that form the basis of a healthful diet.
The Internet Resources
Algae Cal:Magnesium Rich Foods - The website gives us a chart of Foods high in magnesium. And, also, we can find the recommended daily requirements of magnesium. refined grains are generally low in magnesium. When white flour is processed, the magnesium rich germ and bran are removed. Bread made from whole grain wheat flour provides more magnesium than bread made from white refined flour. Tap water can be a source of magnesium, but the amount varies according to the water supply. Water that naturally contains more minerals is described as 'hard'. 'Hard' water usually contains more magnesium than 'soft' water.
Chemi Cool magnesium element facts - This website introduces the basic information about magnesium. The density of magnesium is 1.738 grams per cubic centimeters. Magnesium belongs to Alkali Earth metals, and the atomic volume is 13.97cm3 per mole. The atomic weight is 24.305. Magnesium comes from seawater and magnesite. And pure magnesium costs 3.7 dollars per 100 grams. The products of reaction between air and magnesium are MgO and Mg3N2. Also, it can react with HCl, HNO3, HCl and NaOH.
Chemical Elements: Magnesium - The website gives us basic information about magnesium. Also it has a picture of magnesium atomic structure. It also gives a table of the isotopes of magnesium such as Mg-24,Mg-25,Mg-28. I also found Mg-27 converted with others using 9.45 minutes and Mg-28 converted with others using 21 hours.
Chemistry: Periodic Table: Magnesium - I found the essentials and a brief description of magnesium. Magnesium is the eighth most abundant element in the earth's crust although not found in it's elemental form. And Magnesium is available in several forms including chips, granules, powder, rod, foil, sheet and ribbon. And the website also gives us a picture of magnesium. It is a grayish-white, fairly tough metal. And it has several movies about the experiments of magnesium.
Corrosion Source: magnesium - This website tells the basic information about magnesium. Also, it tells us the history of magnesium. Magnesium was first definited as an element in 1755. Davy isolated it in 1808 and Bussy prepared it in coherent form in 1831.We can find the properties, uses, compounds and sources of magnesium.
Department of Energy magnesium - The website describes the basic information about magnesium. Magnesium is a light, silvery-white, and fairly tough metal. It tarnishes slightly in air, and finely divided magnesium readily ignites upon heating in air and burns with a dazzling white flame. And organic magnesium is important in both plant and animal life. Because serious fires can occur, so we should put magnesium in a safe place.
Hopkins Technology magnesium - The website helps us select foods that provide adequate daily amounts of magnesium. The U.S. RDA for magnesium is 400 milligrams per day. We also can know why magnesium is important for people. Magnesium, a mineral, is used in building bones, manufacturing proteins, releasing energy from muscle storage, and regulating body temperature. The interesting thing I have learned is that cooking for the shortest possible time can retain most magnesium in foods.
Magnesium - This website shows us a magnesium nuclear data chart. And also, a chart about its basic information. Magnesium reacts with boiling water to form magnesium hydroxide and hydrogen gas. Magnesium sulfate, MgSO4.7H2O is called Epsom salt and is used as a cleansing agent. Magnesium oxide, MgO is called magnesia and is used medically for neutralizing excess stomach acid and as a laxative. And the interesting thing is MgO in water is called 'milk of magnesia'.
Medicine Net:Definition of Magnesium - This website tells us the use of magnesium and the food that contains magnesium. Magnesium is contained in all unprocessed foods. High concentrations of magnesium are contained in nuts, unmilled grains, dark-green leafy vegetables, legumes such as peas and beans, and fruit. Magnesium is thus readily available in foods that form the basis of a healthful diet.
Medline Plus Medical Encyclopedia: Magenesium in diet - The website gives us description of its definition, function and food sources. Besides, I can find its side effect. Toxic symptoms from increased magnesium intake are not common because the body eliminates excess amounts. Magnesium excess almost always occurs only when magnesium is supplemented as a medication. Magnesium deficiency is rare. The symptoms include muscle weakness, fatigue, hyperexcitability, and sleepiness. Deficiency of magnesium can occur in alcoholics or people whose magnesium absorption is decreased due to surgery, burns, or problems with malabsorption (inadequate absorption of nutrients from the intestinal tract). Certain medications or low blood levels of calcium may be associated with magnesium deficiency.
Office of Dietary Supplements magnesium - The website describes what magnesium is. And, it also tells us where it is found in foods. Some beans, peas, nuts and seeds, and whole, unrefined grains are good sources of magnesium. Besides, it tells us which group of people need extra magnesium and the best way to get magnesium. however,people have the health risk of taking too much magnesium. So, the website also explains what are the risks if people take too much magnesium. Signs of excess magnesium can be similar to magnesium deficiency and include changes in mental status, nausea, diarrhea, appetite loss, muscle weakness, difficulty breathing, extremely low blood pressure, and irregular heartbeat.
Supplement Watch: Magnesium - The website describes what magnesium is. And, the claims of magnesium such as building bones, increasing energy levels and promoting heart health. Besides, I can find the theory, scientific support and value of magnesium. The scientific support for magnesium as an adjunct to calcium supplements is fairly well-founded. Magnesium can help improve calcium absorption and may help maintain bone density in those individuals at risk for excessive bone loss.
The World's Highest Foods - This website tells us what can high-magnesium foods do for us. And, it also describes what events can indicate a need for more high-magnesium foods. Besides, it gives us a graph to show the world's healthiest foods rich in Magnesium. I can also find the definition of magnesium and the functions of magnesium such as bone formation and nerve and muscle relaxation. Magnesium can relax our nerves and muscles, build and strengthen bones and keep your blood circulating smoothly.
Visual Elements Magnesium - The website tells us the history and the basic description about magnesium. Magnesium is named after Magnesia, a district of Thessaly in Greece, where it was first found. It is an essential element for all living things. Humans take in 250-350 milligrams each day, and we each have about 20 grams in our bodies. It also provides a image of eye of magnesium in the organic molecule of chlorophvll.
Wikipedia Magnesium - I found the properties about magnesium. And the website tells us the use or applications of magnesium as a kind of metal. Magnesium is the third most commonly used structural metal, following steel and aluminium. Also, it describes the magnesium compounds and its use in our real life, like magnesium phosphate is used to fireproof wood for construction and magnesium sulfite is used in the manufacture of paper. And we also can learn the history of magnesium and where it comes from.
Content by rebeccagao10, yigao418@hotmail.com
http://www.kn.att.com/wired/fil/pages/listmgre.html
Last revised Sun Dec 16 18:26:20 US/Pacific 2007
