Table Of Elements

In 1774 John Gahn discovered manganese while living in sweden. Mangeses comes from the latin word "magnes" which means magnet. Manganese is not particularly reactive to air. It is more electropositive than any others on the periotic table of elements.

Another origin of manganese is magnesia nigri, which means black magnesia. The surface of manganese is more ioxide. When manganese is all divided, the manganese metal will burn in air. It burns in oxygen to form the ioxide Mn304 and, in nitrogen to form the nitride Mn3N4.

      Manganese was not only discovered by Gahn. It was also discovered by a man named Scheele Bergman, and others. But Ghan was the one who isolatd the element before all others. Manganese is from manganese is from magnetic properties. Most large portions of manganese are found in the bottom of the ocean.

      Mangese color is usually grayish-white this means that it does have iron in it. But Manganese is used as a depolarizer in ordinary dry cells. It is also used to decolorize glass that is colored green. This glass is colored green because of impurities of iron found in the glass. Manganese by itself colors the glass. The dioxide is also used in the preparation of oxygen and chlorine.

      Manganese is widely distributed throughout the animal kingdom. It is an improtant trace element. Exposure to manganese dusts and fumes should not exceed the ceiling value of 5 mg/m3. Not even for short periods, the elements' toxicity level is to high.

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