First students collected information about the timeline element iodine from library. Students took one week to read and understand about the properties and uses of iodine. Then students shared their knowledge through cooperative learning strategy. They selected six important points for the hexagon, including its discovery in Students designed the hexagon with art work and inserted each point in the hexagon.
The emphasis of this activity was on cooperative learning and creativity. Back to the top. Lithium is a chemical element on the Periodic Table with the symbol Li and the atomic number 3. I drew the Swedish flag because lithium was discovered in Sweden. I illustrated Johan August Arfwedson because he discovered this chemical element in The magenta colour at the top of my artwork represents the magenta flame that lithium produces.
I also included images of lithium pills and lithium batteries. Potassium can effect you when breathed in. Inhalation of dust or mists can irritate the eyes, nose, throat, lungs with sneezing, coughing and sore throat.
Higher exposures may cause a build up of fluid in the lungs, this can cause death. Skin and eye contact can cause severe burns leading to permanent damage. Together with nitrogen and phosphorous, potassium is one of the essential macrominerals for plant survival. Its presence is of great importance for soil health, plant growth and animal nutrition. Its primary function in the plant is its role in the maintenance of osmotic pressure and cell size, thereby influencing photosynthesis and energy production as well as stomatal opening and carbon dioxide supply, plant turgor and translocation of nutrients.
As such, the element is required in relatively large proportions by the growing plant. The consequences of low potassium levels are apparent in a variety of symptoms: restricted growth, reduced flowering, lower yields and lower quality produce. High water soluble levels of potassium cause damage to germinating seedlings, inhibits the uptake of other minerals and reduces the quality of the crop. Check out our potassium in water page. Several methods can be applied to separate potassium salts from Na- and Mn-compounds.
Particularly, fractional precipitation is a widely used method to isolate these soluble salts. And most of the potassium is acquired in the form of Potassium Chloride KCl and used as fertilizer. Sir Humphry Davy first isolated pure potassium through a simple lab-based chemistry experiment in More specifically, he applied electricity to melted wood ashes in a process called electrolysis.
In the electrolysis of wood ash, a solution is first prepared by placing the wood ash into a metal dish and heating the ash with a Bunsen burner.
The ash, containing a high concentration of potassium hydroxide KOH , will melt. Then, a wire attaches to each electrode of a battery, and the battery leads are placed into the molten ash until liquid potassium metal forms near the anode. The wire on the positive terminal serves as the anode, and the wire on the negative terminal is the cathode. At the anode, potassium metal accumulates. This electrolysis process was also used in industries in the s. However, the thermal process of reacting sodium with potassium chloride in a chemical equilibrium reaction became the dominant industrial method.
The electron configuration of potassium is [Ar]4s 1. Potassium is a soft alkali metal with a color of silvery-white.
It can react with water and oxygen. Regular chemical suppliers sell Potassium. Lower purity of potassium metal is cheaper. However, the long-term storage of potassium metal is complex.
Dry non-reactive gas or mineral oil surrounds the element to prevent the formation of a potassium superoxide layer. In addition, because potassium is essential for human health, most general stores sell potassium for people who do not have enough potassium in their daily diet or have potassium deficiency because of illness.
Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. October 10, Posted by Rui Shi. The Element Potassium Introduction to Potassium Potassium, represented with the symbol K, is one of the alkali metals. Potassium doesn't get as much attention as sodium in the popular press, but it's extremely important, said Sylvia Wassertheil-Smoller, a professor emerita of epidemiology at the Albert Einstein College of Medicine in New York.
In September , Wassertheil-Smoller and her colleagues found that a diet high in potassium was linked to fewer strokes in postmenopausal women. Overall, women who ate the most potassium in their diets were 12 percent less likely to have a stroke during the year study period. Notably, Wassertheil-Smoller told Live Science, potassium's protective effect "went beyond blood pressure.
Among women with normal blood pressure, those who ate the most potassium were 21 percent less likely to have a stroke than those who ate the least. Potassium is in a lot of foods, Wassertheil-Smoller said, most famously bananas. It's also in potatoes , leafy greens, salmon, apricots, squash, tomato paste and milk. But chances are you aren't reaching the recommended consumption of this nutrient. Other countries didn't do much better: Only about 5 percent of Mexicans, 23 percent of people in France and 8 percent of Brits managed to eat enough potassium.
The data confirm that people don't get enough potassium for optimal health, said study researcher Adam Drewnowski, an epidemiologist at the University of Washington. On the other hand, the low rate of compliance with the recommendations suggests that the goals are unfeasible, Drewnowski said in a statement.
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