The element potasium is an essential element to human and plant life. Potasium was discoved on October 6, 1807, when Sir Humphrey Davy joined a piece of solid potasium to the poles of a battery which caused the release of a battery which caused the rease of a metal at the negative pole of a battery. He called this element Potassium Potasium's physical properties as a metal are very recognizable. This metal is the seventh most plentiful and makes up about 1.5% of the earths crust by wieght. Potassium is a necessary constituent for the growth of plants and is found in most soils. This element is also vital to the human diet. Potassium is obtained through electrolysis of the chloride or hydroxide, but is never found free in nature. It is one of the most reactive and most electropositive of the metals and exept for lithium.

      Potassium is the least dense known metal. It is so soft, and it is easily cut with a knife. Immediatly after a fresh surface is exposed, it has a silvery appearence. These are the physical properties of Potassium.

Potassium
      The chimical properties of Potassium are individual. In air, it very rapidly oxidises and must be stored under argon or under suitable mineral oil. It will decompose in water. It ussually catches fire during the reaction with the water. Potassium as well as its salts imopart a lilac color to flames. On the table of elements, Potassium symbol is K and its atomic number is 19. Normally potassium would not be made in laboratories, since it is so readily availible commercially. Since it is so difficult to add an electron to the porly electronegative potassium ion, all syntheses require an electrolytic step.

      Potassium is essental to the bodys maintance and growth. A Potassium deficiency can be caused by vomiting and/or diarrhea, medications, and persperations. Some signs of potasium fefficiancy are: muscle weakness, mental confusion, fatiage, heart disturbance, irrability, and muscle cramps. Potassium's functions include acid base balance, if there is imbalance, the heart may beat irregularly. Both potasium and soudium are activily transported in and out of the cells body. They are both very water soluble and tend to disolve easily in cooking water. Foods that are cooked in this fashion are often much lower in nutrional value. There are several foods that contain potassium. Some of them are bananas and grapefruit.

      From its beginning in 1807, until today, it has been used for many things. It is needed in the health of plants and humans alike. It is also found in friuts and vegstables. The soft metal Potassium has many physical and chimical properties, some that i sshared with other elements, some that it holds all its own.




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