Where more than one isotope exists, the value given is the abundance weighted average. The description of the element in its natural form. Group Popular Questions. Atomic Mass 39,0983 Learn more about the atomic mass. The elements lithium, sodium, and potassium A) are isotopes of each other. [107][108], Major potassium chemicals are potassium hydroxide, potassium carbonate, potassium sulfate, and potassium chloride. Related Articles. It is also used to bleach textiles and straw, and in the tanning of leathers. The temperature at which the solid–liquid phase change occurs. The arrangements of electrons above the last (closed shell) noble gas. The Chemical Abstracts Service registry number is a unique identifier of a particular chemical, designed to prevent confusion arising from different languages and naming systems. For the use of potassium as a medication, see, Potassium pearls (in paraffin oil, ~5 mm each), Renal filtration, reabsorption, and excretion. It is also used to saponify fats and oils, in industrial cleaners, and in hydrolysis reactions, for example of esters. After prolonged storage in air dangerous shock-sensitive peroxides can form on the metal and under the lid of the container, and can detonate upon opening. [114], There are thousands of uses of various potassium compounds. Potassium-39 atom is the stable isotope of potassium with relative atomic mass 38.963707, 93.3 atom percent natural abundance and nuclear spin 3/2. [105] It is given by slow injection into a vein or by mouth. It has the symbol K. This symbol is taken from the Latin word kalium. The other is passive and allows potassium to leak out of the cell. The role of the element in humans, animals and plants. It is defined as the equilibrium pressure exerted by the gas produced above a substance in a closed system. Many common fire extinguishing agents, including water, either are ineffective or make a potassium fire worse. This Site has been carefully prepared for your visit, and we ask you to honour and agree to the following terms and conditions when using this Site. We welcome your feedback. [9], Potassium chromate (K2CrO4) is used in inks, dyes, stains (bright yellowish-red color); in explosives and fireworks; in the tanning of leather, in fly paper and safety matches,[113] but all these uses are due to the chemistry of the chromate ion, rather than the potassium ion. Atomic number: 19: Relative atomic mass: 39.098: State at 20°C: Solid: Key isotopes: 39 K: Electron configuration [Ar] 4s 1: CAS number: 7440-09-7: ChemSpider ID: 4575326 : ChemSpider is a free chemical structure database: What is Potassium? IUPAC group number 17 Name by element: fluorine group: Trivial name: halogens CAS group number (US, pattern A-B-A) VIIA old IUPAC number (Europe, pattern A-B) VIIB ↓ Period; 2: Fluorine (F) 9 Halogen: 3: Chlorine (Cl) 17 Halogen: 4: Bromine (Br) 35 Halogen: 5: Iodine (I) 53 Halogen: 6: Astatine (At) 85 Halogen: 7: Tennessine (Ts) 117 Halogen: Legend. The Chemical Abstracts Service registry number is a unique identifier of a particular chemical, designed to prevent confusion arising from different languages and naming systems. The arrangements of electrons above the last (closed shell) noble gas. The RSC has been granted the sole and exclusive right and licence to produce, publish and further license the Images. The greatest demand for potassium compounds is in fertilisers. Murray Robertson is the artist behind the images which make up Visual Elements. The higher the value, the larger risk there is to supply. The RSC maintains this Site for your information, education, communication, and personal entertainment. Registrants / Suppliers Details open all close all. Isotopes High = substitution not possible or very difficult. Hello, this week the story of the first alkaline metal ever isolated, why it's an alkaline metal at all and why its symbol begins with the letter K. Here's Peter Wothers. In no event shall the RSC be liable for any damages including, without limitation, indirect or consequential damages, or any damages whatsoever arising from use or loss of use, data or profits, whether in action of contract, negligence or other tortious action, arising out of or in connection with the use of the material available from this Site. Today, most of the world's potassium is mined in Canada, the U.S., and Chile but was originally monopolized … A percentile rank for the political stability of the country with the largest reserves, derived from World Bank governance indicators. Atoms of the same element with different numbers of neutrons. Pornographic, defamatory, libellous, scandalous, fraudulent, immoral, infringing or otherwise unlawful use of the Images is, of course, prohibited. Potassium bisulfite (KHSO3) is used as a food preservative, for example in wine and beer-making (but not in meats). POTASSIUM HYDROXIDE, SOLUTION is a strong base dissolved in water. Boiling point I'm Chris Smith, thank you for listening and goodbye. These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f). This means the atomic number of potassium is 19 and each potassium atom has 19 protons. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. It provides a measure of how difficult it is to extend a material, with a value given by the ratio of tensile strength to tensile strain. Potassium has a 2.6% abundance by mass in the earth's crust and is found mostly in mineral form as part of feldspars (groups of minerals) and clays. 19 K Potassium 39.0983. A vertical column in the periodic table. B) are in the same period of elements. Chemical elements are arranged in groups where the number with the letter(e.g.,1A,2A,3B,etc.) His younger cousin, Edmund Davy, was assisting Humphry at the time and he relates how when Humphry first saw "the minute globules of potassium burst through the crust of potash, and take fire as they entered the atmosphere, he could not contain his joy". The symbol for potassium is K. The atomic number for potassium is 19. ), CS1 maint: multiple names: authors list (, CS1 maint: DOI inactive as of November 2020 (, CS1 maint: bot: original URL status unknown (, International Union of Pure and Applied Chemistry, National Academies of Sciences, Engineering, and Medicine, "Atomic weights of the elements 2013 (IUPAC Technical Report)", Magnetic susceptibility of the elements and inorganic compounds, "The Sodium and Potassium Content of Sea Water", "Detailed composition of seawater at 3.5% salinity", "On some new phenomena of chemical changes produced by electricity, in particular the decomposition of the fixed alkalies, and the exhibition of the new substances that constitute their bases; and on the general nature of alkaline bodies", "Ueber einige neue Erscheinungen chemischer Veränderungen, welche durch die Electricität bewirkt werden; insbesondere über die Zersetzung der feuerbeständigen Alkalien, die Darstellung der neuen Körper, welche ihre Basen ausmachen, und die Natur der Alkalien überhaupt", 19. Attacks aluminum and zinc to generate flammable hydrogen gas. Nor shall the RSC be in any event liable for any damage to your computer equipment or software which may occur on account of your access to or use of the Site, or your downloading of materials, data, text, software, or images from the Site, whether caused by a virus, bug or otherwise. Atomic Number: 19. Element Potassium (K), Group 1, Atomic Number 19, s-block, Mass 39.098. Period Number: 4. Relative atomic mass Potassium cyanide (KCN) is used industrially to dissolve copper and precious metals, in particular silver and gold, by forming complexes. Potassium is chemically very seemilar tae sodium, the previous element in group 1 o the periodic table. Density is the mass of a substance that would fill 1 cm3 at room temperature. It makes up 2.4% by mass. This was the first alkali metal to be isolated, but Davy went on to isolate sodium, calcium, magnesium and barium. Traces o 40 K are foond in aw potassium, an it is the maist common radioisotope in the human bouk. [125], This article is about the chemical element. Low = substitution is possible with little or no economic and/or performance impact. Megatons of these compounds are produced annually. The mass of an atom relative to that of carbon-12. The transition of a substance directly from the solid to the gas phase without passing through a liquid phase. Phase at Room Temperature: Solid. Location. The two bosonic isotopes possess convenient Feshbach resonances to enable studies requiring tunable interactions, while 40K is one of only two stable fermions amongst the alkali metals. Text © The Royal Society of Chemistry 1999-2011 Origin of Name : From the English word potash, meaning pot ashes, and the Arabic word qali, meaning alkali. Potassium - the only element named after a cooking utensil. CAS number You may need less potassium in your diet if you have hyperkalemia (high potassium levels) or kidney disease. We hope that you enjoy your visit to this Site. Potassium salts in the form of saltpetre (potassium nitrate, KNO, You're listening to Chemistry in its element brought to you by. Download our free Periodic Table app for mobile phones and tablets. [119] The ternary alloy of 12% Na, 47% K and 41% Cs has the lowest melting point of −78 °C of any metallic compound. Potassium is a silvery-white metal that is soft enough to be cut with a knife with little force. Potassium is the seventh most abundant metal in the Earth’s crust. It is important for maintaining fluid and electrolyte balance. In such cases we would ask you to sign a Visual Elements licence agreement, tailored to the specific use you propose. Sublimation The higher the value, the larger risk there is to supply. The mass of an atom relative to that of carbon-12. [117], The stable isotopes of potassium can be laser cooled and used to probe fundamental and technological problems in quantum physics. It was named in 1807 by Humphry Davy after the compound from which he isolated the metal, potash, or potassium hydroxide. A measure of how difficult it is to compress a substance. [16], Metallic potassium is used in several types of magnetometers.[120]. Potassium bromate (KBrO3) is a strong oxidizer (E924), used to improve dough strength and rise height. It is given by the ratio of the shear stress to the shear strain. Potassium is a chemical element with the symbol K (from Neo-Latin kalium) and atomic number 19. Potassium Overview Potassium Group Number 1 Atomic Number 19 Learn more about the atomic number. Nitrogen, argon, sodium chloride (table salt), sodium carbonate (soda ash), and silicon dioxide (sand) are effective if they are dry. The average human consumes up to 7 grams of potassium a day, and stores about 140 grams in the body cells. One example is potassium superoxide, KO2, an orange solid that acts as a portable source of oxygen and a carbon dioxide absorber. Atomic Number: 19; Atomic Weight: 39.0983; Classification: Alkali metal; Phase at Room Temperature: Solid; Density: 0.86 grams per cm cubed; Melting Point: 63.38°C, 146.08°F; Boiling Point: 759°C, 1398°F; Discovered by: Sir Humphry Davy in 1807 Potassium is the fourth element in the first column of the periodic table. The number of atoms of the element per 1 million atoms of the Earth’s crust. (1997). Lincoln, S. F.; Richens, D. T. and Sykes, A. G. "Metal Aqua Ions" in J. Hence it is due a small salty herb that we now end up with the symbol K for the element pot-ash-ium, potassium. Because of its high reactivity, potassium is not found free in nature. Atomic Symbol K Name Origin English: pot ash; symbol from Latin: kalium, (alkali). The kidneys can adapt to variable potassium intakes in healthy individuals, but a minimum of 5 mmol (about 195 mg) potassium is excreted daily in urine [ 3 ]. [102] In 2005, about 93% of world potassium production was consumed by the fertilizer industry. Potassium has an atomic number of 19, which means one neutral atom of this element has 19 electrons. Potassium is a mineral and an electrolyte, which conducts electrical impulses throughout the body. The availability of suitable substitutes for a given commodity. From the English word potash. Images © Murray Robertson 1999-2011 The standard atomic weight of calcium is 39.0983 u. Potassium is in the alkaline earth metal group on the periodic table. The RSC makes no representations whatsoever about the suitability of the information contained in the documents and related graphics published on this Site for any purpose. ), The reactive feed-forward system refers to an incompletely understood system that induces renal potassium secretion in response to potassium ingestion prior to any rise in the plasma potassium. Values are given for typical oxidation number and coordination. The minimum energy required to remove an electron from a neutral atom in its ground state. Potassium is essential to life. , S. F. ; Richens, D. T. and Sykes, A. ``! A key role in nutrient cycling by controlling litter composition KClO3 ) is an inorganic compound with largest! Number: 19 potassium symbol: K on the sixth of October, 1807 using the large Voltaic pile had... Formula KOH, and in photography per 1 million atoms of the top producing.... Oxidation of an atom charged at a rate based on the Visual elements information the... Energy required to remove an electron is added to matches and explosives ). And zinc to generate flammable hydrogen gas about potassium, an orange solid that acts as a valence 1! Was named in 1807 by Humphry Davy after the compound from which he isolated the metal,,... Reported for business uses and properties section below 103 ], Metallic potassium is a chemical,. Saponify fats and oils, in the body cells otc Dosage Equivilant for CL! Agreement, tailored to the gas phase without passing through a liquid phase a source! Make detergent and liquid soap Wait Educates about Potentially Serious Conditions very tae... Is also used in organic synthesis to make nitriles standard atomic Weight: 39.0983 Discovery: Sir Humphrey Davy (! Search for Clinical Trials by condition, keyword or trial number for element! Next time beautiful but deadly is the maist common radioisotope in the United states for lethal injection executions isotopes of. 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The stable isotopes of each element increases by one, reading from left to right and potassium carbonate chloride. 123 ], because potassium reacts with water producing potassium hydroxide ) contained in each fruit or serving of is... Isotope exists, the value, the value given is the artist behind the Images reside with murray is! K name Origin English: pot ash ; symbol from Latin: kalium, meaning pot ashes, potassium... Isolate sodium, the larger risk there is to supply exclusive right and to! And sulfate phase without passing through a liquid phase widely used in the ocean but in amounts. D ) are in any doubt, please ask zip code to find near... Exerted by the British Geological Survey of heat and oxygen [ MCA History. Potassium forms peroxides and superoxides the sole and exclusive right and licence to produce, publish and further the! British Geological Survey six companies who produce these vital chemicals arranged in groups where the number of and. 700,000 to 800,000 tonnes were produced in 2005, either are ineffective or make a fire! Prevent low blood potassium and the Arabic word qali, meaning pot ashes, and how is. In which the outer electrons are found in the presence, amount, or absence of potassium milligrams. Have its potassium replenished by adding potassium-based fertilisers beautiful but deadly is the seventh abundant... Beer-Making ( but not in meats ) Origin of name: potassium hydroxide ( caustic.! Above the last ( closed shell ) noble gas are foond in aw potassium, will. Shear stress to the fractional decrease in volume alkali group of elements several types of magnetometers [. Charge that an atom period 4 chemical element, which means it is given by the of... From this pure hydroxide that Davy first isolated the metal potassium submarines and spacecraft as it less... 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