Potassium

Potassium
An Internet Hotlist on potassium

created by mollywang09

Introduction | Basic information | Medicine | Uses

Introduction

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Potassium was discovered in London by Humphry Davy in 1807 and potassium is derived from potash.

The atomic number is 19
The atomic mass is 39.0983
Potassium has a symbol of K.
The density of potassium is 0.862g/cm3.
Potassium is silvery and soft. It’s easy to cut with a knife and it is solid at room temperature.
The melting point of the potassium is 63 degrees and the boiling point is 759 degrees.
Potassium is a very reactive metal. It can react with air to K2O. And its also can react to KH and KCL so on.
Too much potassium can be toxic and will affect your heart.
Potassium is an essential elemental for plant growth and is found in most soils.
And an alloy of sodium and potassium is used as a heat-transfer medium.
Potassium can be used to make glasses and soaps.
Except for iridium, it is the lightest know metal.
Potassium is important to several body functions. Like, legs and arms need potassium to move and heart can’t beat without potassium.
The best food sources of potassium are fruit, vegetable and meat.

The Internet Resources

Basic information

Chemi Cool Potassium - This website tells us the general, states, energies, reactions and other froms of potassium. Its electronegativity is 0.82. And its electron affinity is 48.385 kJ/mole. Potassium react with air is KO2. Potassium react with NaOH is H2 and KOH. Some other froms of potassium: K2O, KH and KCl.
Chemical Elements Potassium - This website shows us the density, isotopes uses of potassium. The density of potassium is 0.862 g/cm3. Number of energy levels of potassium is 4. The first energy levels is 2; second and third energy levels are 8; forth energy levels is 1. Isotope of potassium are: K-39, K-40, K-41, K-42 andK-43. We uses potassium to make glass and soap.
Tjclarkminerals Potassium - This webside tells us importance, deficiencies, dietary recommendations, food sources, toxicity and recent research of potassium. Potassium(K) in the from of K+. Potassium exists in nature in three isotopes. They are K-39, K-40 and K-41. The percentage are: 93.26%, 0.0117% and 6.73%. Most foods contain potassium. The best food sources are fruit, vegetablesand juices. Meats and cereals also haave potassium. Total body potassium is descreasing with age and most of the total body potassium is found in muscle tissue.
Webelements Potassium - This website shows us the essentials and some description about potassium. Also, there are movies about potassium. For example, potassium's group number is 1 and period number is 4. Its atomic weight is 39.0983. It's a solid qt 298k. It's a vital element in the human diet. And it's one of the most reactive and electropositive of metals.
Wikipedia Potassium - This is a wetsite which tell us the characteristics, applications, history, occurrence, isotopes and precautions. Potassium is a chemical element. It has the symbol K and atomic number 19. Potassium is a soft silvery-white metallic. It is belongs to alkali metal. Potassium was discovered in London by Humphry Davy. Also, potassium makes up about 1.5% of the weight of the Earth's arust.

Medicine

Emedicinehealth Potassium - This website shows potassium is important to several body functions. For example, our legs and arms need potassium for the muscles to move. Heart can't beat without potassium. Also, it's necessary to regulate blood pressure. And the kidney controls the balance of potassium. When potassium levels are low, you will become weak.
Merck Potassium - This website introduce of hypokalemia and hyperkalemia. In hypokalemia, the level of potassium in the blood is too low. In hyperkalemia, the level of potassium in the blood is too high. The level of potassium in the blood must be maintained within a narrow range. A potassium level that is too high or too low can have serious consequences, such as an abnormal heart rhythm or even cardiac arrest.
UMM Potassium - We can know the overview, dietary sources, available forms of potassiun. It plays a key role in cardiac, skeletal, and smooth muscle contraction, making it an important nutrient for normal heart, digestive, and muscular function. The best dietary sources of potassium are fresh unprocessed foods, including meats, fish, vegetables, fruits, citrus juices, dairy products and whole grains. There are several potassium supplements: potassium acetate, potassium bicarbonate, potassium citrate, potassium chloride, and potassium gluconate.
Whfoods Potassium - This website tells us some roles, deficiency symptoms and toxicity symptoms for potassium. Potassium play an important role onthe body's proper electrolyte and pH balance. Also, it helps to prevent bones from thinning out at a fast rate. The symptoms of potassium deficiency include muscle weakness, confusion, irritability, fatigue, and heart disturbances. Elevated blood levels of potassium can be toxic, and may cause an irregular heartbeat or even heart attack.
Zest For Live Potassium - This website tells us the deficiency, toxicity, symptoms, enemy and other interesting points on potassium. We need for growth, building muscles, transmission of nerve impulses and heart activity. It is also a good idea to increase your potassium intake. So, a great way to include this in your diet is to have a banana, citrus fruit or even a dash of apple cider vinegar. A person should take twice as much potassium as sodium, and is best taken with vitamin B6.

Uses

Britannica Potassium - It shows ue the Properties, occurrence, and uses of the potassium. It rapidly oxidizes in air and must be preserved in a mineral oil such as kerosene. It is one of the most reactive and electropositive of metals. Except for iridium, it is the lightest known metal. Too little or too much potassium in the body is fatal, but potassium is indispensable element in food.
Corrosion Source Potassium - This website shows ue the history, sources, production, uses and properties of the potassium. Potassium was the first metal isolated by electrolysis. Potassium also can found in the ocean, but is present only in relatively small amounts, compared to sodium. As with other metals of the alkali group, it decomposes in water with the evolution of hydrogen. Potassium and its salts impart a violet color to flames. It is soft, easily cut with a knife, and is silvery in appearance immediately after a fresh surface is exposed.
Jefferson Lab Potassium - This website tells us the history and uses of the potassium. Potassium is the eighth most abundant element on earth. It comprises about 2.1% of the earth's crust.Pure potassium is a soft metal that can be easily cut with a knife. Potassium chloride (KCl) is the most common potassium compound. It is used in fertilizers as a salt substitute and to produce other chemicals.
Periodic Potassium - This website tell us the history, sources, production, uses, properties and isotopes of the potassium. For instence, the melting point of the potassium is 63 degrees and the boiling point is 759 degrees. Except for lithium, it is the lightest metal we known. It is soft, easily cut with a knife. Potassium was discovered in 1807 by Davy who also found KOH. Thermal methods can used to produce potassium. An alloy of sodium and potassium (NaK) is used as a heat-transfer medium.
Theodoregray Potassium - This website shows the picture of potassium. So, we know the potassium is solid at room temperature. Potassium plays many important roles in the chemical processes of life, including nerve impulse transmission. In all the situations, the potassium is in the form of K- ions, not elemental potassium. Like all alkali metals, potassium metal can't last long in the real world. It will reacting quickly with water or damp in the air to form potassium hydroxide and hydrogen gas.

Content by mollywang09, mollywang27@hotmail.com
http://www.kn.att.com/wired/fil/pages/listpotassiumo1.html
Last revised Mon Dec 17 11:47:02 US/Pacific 2007