fluorine is considered which of the following?fluorine is considered which of the following?

Oxygen only needs 2 electrons in its valence shell. Since UF6 is as corrosive as fluorine, gaseous diffusion plants required special materials: nickel for membranes, fluoropolymers for seals, and liquid fluorocarbons as coolants and lubricants. Why do capacitors have less energy density than batteries? It will not turn on. Small amounts of fluorine may be beneficial for bone strength, but the latter has not been definitively established. Organofluorine compounds often persist in the environment due to the strength of the carbonfluorine bond. Omissions? I think this is the original question. [65], As with other iron alloys, around 3kg (6.5lb) metspar is added to each metric ton of steel; the fluoride ions lower its melting point and viscosity. Chemistry College answered expert verified Fluorine is considered which of the following? To prevent rapid corrosion of the platinum in his electrochemical cells, he cooled the reaction to extremely low temperatures in a special bath and forged cells from a more resistant mixture of platinum and iridium, and used fluorite stoppers. 5.1 Listed Hazardous Wastes (F, K, U, and P lists) The EPA has 4 lists of hazardous wastes. Teflon is well known for its non-stick properties and is used in frying pans. Its effects in humans start at concentrations lower than hydrogen cyanide's 50 ppm[255] and are similar to those of chlorine:[256] significant irritation of the eyes and respiratory system as well as liver and kidney damage occur above 25 ppm, which is the immediately dangerous to life and health value for fluorine. 30) What is the name of the ionic compound made of beryllium and chlorine? The fluorine-containing mineral fluorspar (or fluorite) was described in 1529 by the German physician and mineralogist Georgius Agricola. [266][271], Soluble fluorides are moderately toxic: 510g sodium fluoride, or 3264mg fluoride ions per kilogram of body mass, represents a lethal dose for adults. Fluorides, unlike other halides, are insoluble and do not occur in commercially favorable concentrations in saline waters. ScholarOn, 10685-B Hazelhurst Dr. # 25977, Houston, TX 77043,USA. To complete it's octet, there's a need for Fluorine to form a diatomic molecule, thereby existing as Fl2. [276] A larger study across the U.S. had similar findings: 80% of cases involved children under six, and there were few serious cases. Fluorine has appropriate values for all of the common scales to ensure it has the highest electronegativity. Some metals, such as nickel, are quickly covered by a fluoride layer, which prevents further attack of the metal by the element. You are exposed to a substance only when you come in contact with it. Proposed as an element in 1810, fluorine proved difficult and dangerous to separate from its compounds, and several early experimenters died or sustained injuries from their attempts. 29) What is the formula for an ionic compound made of aluminum and oxygen? Most had no symptoms, but about 30% had stomach pains. cubic. attraction force between nucleus and adding electron increase so electronegatevity increase too. 25) Fluorine is considered which of the following? [32] Although nitrogen trifluoride is stable, nitrogen requires an electric discharge at elevated temperatures for reaction with fluorine to occur, due to the very strong triple bond in elemental nitrogen;[33] ammonia may react explosively. Chlorofluorocarbon restrictions lowered this to 3.6million tons in 1994; production has since been increasing. Exposure limits are determined by urine testing of the body's ability to clear fluoride ions. Diatomic compounds consist of two different elements. rev2023.7.24.43543. Why does ksh93 not support %T format specifier of its built-in printf in AIX? Fluorine has appropriate values for all of the common scales to ensure it has the highest electronegativity. But fluorine has 7 valence electrons, 1 away from being filled. Upon cooling fluorine becomes a yellow liquid. Thanks for contributing an answer to Chemistry Stack Exchange! Organohalogen compound | Definition, Examples, Uses, & Facts 25) What is the formula for an ionic compound made of barium and nitrogen? [278] One regional study examined a year of pre-teen fluoride poisoning reports totaling 87 cases, including one death from ingesting insecticide. [80][174] Regulator valves and pipework are made of nickel, the latter possibly using Monel instead. Used for air conditioning systems, propellants and solvents, their production was below one-tenth of this peak by the early 2000s, after widespread international prohibition. Get a Britannica Premium subscription and gain access to exclusive content. Question : 21) Fluorine considered which of the following? A) atomic Uploaded By sravancv. [165] Various PTFE derivatives are less temperature-tolerant but easier to mold: fluorinated ethylene propylene replaces some fluorine atoms with trifluoromethyl groups, perfluoroalkoxy alkanes do the same with trifluoromethoxy groups,[165] and Nafion contains perfluoroether side chains capped with sulfonic acid groups. Fluorine: The Most Reactive And Indispensable Chemical Element In Our [192] Other important inorganic fluorides include those of cobalt, nickel, and ammonium. Physical and Chemical Properties - Chemistry - UH Pressbooks DEC has the same listing as the EPA, with one additional list for Polychlorinated Biphenyl (PCB) wastes. The Chemistry of the Halogens - Division of Chemical Education, Purdue Then, however, the use of uranium hexafluoride in the separation of uranium isotopes, along with the development of organic fluorine compounds of industrial importance, made fluorine an industrial chemical of considerable use. Study with Quizlet and memorize flashcards containing terms like A single portion of which of the following foods contains only a trace of carbohydrates?, European studies suggest that which dietary supplement may slow the progress of Alzheimer's disease?, Fluorine is important for proper: and more. Answer: 4.90 10 M. Explanation: There is some info missing. Fluorine is identified as the most electronegative element in the periodic table, making it the strongest oxidizing agent. The fluorine-containing mineral fluorspar (fluorite, CaF2) has been used for centuries as a flux (cleansing agent) in various metallurgical processes. Learn more about Stack Overflow the company, and our products. Fluorine is the most electronegative element because the definition of electronegativity makes it so. Its promiscuity makes it impossible to store . Our community brings together students, educators, and subject enthusiasts in an online study community. Fluorine is a member of the halogen group of the periodic table which are characterized by the presence of 7 Valence electrons in their outermost shell. [1] The 83rd element, bismuth, was traditionally regarded as having the heaviest stable isotope, bismuth-209, but in 2003 . 21) Fluorine considered which of the following? KF, which acts to provide electrical conductivity, is essential since pure HF cannot be electrolyzed because it is virtually non-conductive. At a low enough temperature the molecules will all be solids. [4][23], Reactions of elemental fluorine with metals require varying conditions. [186] Several fluorine compounds are used in electronics: rhenium and tungsten hexafluoride in chemical vapor deposition, tetrafluoromethane in plasma etching[187][188][189] and nitrogen trifluoride in cleaning equipment. Sorted by: 20. For work with fluorine at temperatures up to 600 C (1,100 F), Monel is suitable; sintered alumina is resistant up to 700 C (1,300 F). Dwell time in the body varies greatly by species, with half-lives of days in rodents, and years in humans. 5. This was first attributed to the conversion of tooth enamel hydroxyapatite into the more durable fluorapatite, but studies on pre-fluoridated teeth refuted this hypothesis, and current theories involve fluoride aiding enamel growth in small caries. Correct Answer: Access For Free . Post any question and get expert help quickly. Making statements based on opinion; back them up with references or personal experience. Kindly login to access the content at no cost. [201] Jerked PTFE film becomes expanded PTFE (ePTFE), a fine-pored membrane sometimes referred to by the brand name Gore-Tex and used for rainwear, protective apparel, and filters; ePTFE fibers may be made into seals and dust filters. He received the 1906 Nobel Prize for Chemistry for isolating fluorine. [263], Hydrofluoric acid is a contact poison with greater hazards than many strong acids like sulfuric acid even though it is weak: it remains neutral in aqueous solution and thus penetrates tissue faster, whether through inhalation, ingestion or the skin, and at least nine U.S. workers died in such accidents from 1984 to 1994. Show transcribed image text Expert Answer 100% (5 ratings) Metals are the elements which have the tendenc View the full answer Transcribed image text: [153], The carbonfluorine bond is organic chemistry's strongest,[156] and gives stability to organofluorines. ", "Perfluoroalkyl Acids: What is the Evidence Telling Us? This E-mail is already registered with us. [266], Exposure may not be evident for eight hours for 50% HF, rising to 24 hours for lower concentrations, and a burn may initially be painless as hydrogen fluoride affects nerve function. First, the cation is written before the anion. [65][197] Chlorofluorocarbons (CFCs) like R-11, R-12, and R-114 once dominated organofluorines, peaking in production in the 1980s. A) atomic element B) molecular : 2038265 21) Fluorine is considered which of the following? Research in this area is usually driven by commercial applications;[158] the compounds involved are diverse and reflect the complexity inherent in organic chemistry. Solved Which of the following atoms is the most | Chegg.com Kindly login to access the content at no cost. Part of the problem was finding an oxidizing agent strong enough to oxidize the F-ion to F 2.The task of preparing fluorine was made even more difficult by the extraordinary toxicity of both F 2 and the hydrogen fluoride (HF) used to make it.. This E-mail is already registered with us. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. fluorine argon strontium nitrogen phosphorus i know this answer i posted accidently please dont take this question. Study with Quizlet and memorize flashcards containing terms like Carbon monoxide is considered which of the following, Fluorine is considered which of the following, Ammonium fluoride is considered which of the following and more. In pure form, it is a highly toxic, reactive, yellowish-green gas. Period 2 is the first period in the periodic table from which periodic trends can be drawn. -Fluorine has a regular pattern of molecules and is a crystalline solid, but its molecules do not have a specific orientation. [218][219] Reviews of the scholarly literature in 2000 and 2007 associated water fluoridation with a significant reduction of tooth decay in children. 21) Fluorine considered which of the following? Please refer to the appropriate style manual or other sources if you have any questions. [227], Tricyclics and other pre-1980s antidepressants had several side effects due to their non-selective interference with neurotransmitters other than the serotonin target; the fluorinated fluoxetine was selective and one of the first to avoid this problem. Lewis dot structure for the N O + ion with ten valence electrons. [137][138] The pnictogens form trifluorides that increase in reactivity and basicity with higher molecular weight, although nitrogen trifluoride resists hydrolysis and is not basic. Circlip removal when pliers are too large. Oxygen hydrogen nitrogen Question 4 Which one of the following elements does not exist as a diatomic molecule in nature? B) molecular, 21) Fluorine considered which of the following? ionic compound atomic element molecular element molecular compound none of the above See answer Advertisement Eduard22sly Answer: fluorine is a molecular element Explanation:Molecular element is a molecular substance consisting of a single element Alkali metals cause explosions and alkaline earth metals display vigorous activity in bulk; to prevent passivation from the formation of metal fluoride layers, most other metals such as aluminium and iron must be powdered,[21] and noble metals require pure fluorine gas at 300450C (575850F). A) barium sulfide B) calcium acetate C) nitrogen monoxide D . Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. [54] The isotopes 17F and 18F undergo + decay and electron capture, lighter isotopes decay by proton emission, and those heavier than 19F undergo decay (the heaviest ones with delayed neutron emission). Our Experts can answer your tough homework and study questions. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. [277] Dangers from toothpaste are aggravated for small children, and the Centers for Disease Control and Prevention recommends supervising children below six brushing their teeth so that they do not swallow toothpaste. The colourless, transparent crystals of fluorspar exhibit a bluish tinge when illuminated, and this property is accordingly known as fluorescence. The synthesis of fluorine escaped the efforts of chemists for almost 100 years. [62], In 1529, Georgius Agricola described fluorite as an additive used to lower the melting point of metals during smelting. 23) Which of the following species is a molecular element? [65][80][184], At least 17,000metrictons of fluorine are produced each year. Only in 1886 did French chemist Henri Moissan isolate elemental fluorine using low-temperature electrolysis, a process still employed for modern production. [77], Hydrofluoric acid was used in glass etching from 1720 onward. Solved > 21) Fluorine is considered which of the following?:2038265 The closer it gets to being full, we know that electronegativity increases. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. [206], Fluorosurfactants are small organofluorine molecules used for repelling water and stains. In general the spin endows them with angular momentum and with a magnetic moment; the first because of their mass, the second because all or part of their electric charge may be rotating with the mass. [63] Trace quantities of organofluorines of uncertain origin have been detected in volcanic eruptions and geothermal springs. [105][106][107], Covalent bonding first comes to prominence in the tetrafluorides: those of zirconium, hafnium[108][109] and several actinides[110] are ionic with high melting points,[111][note 12] while those of titanium,[114] vanadium,[115] and niobium are polymeric,[116] melting or decomposing at no more than 350C (660F). The misspelling is common, but the "u" comes before the "o" in both. It appears likely that crude hydrofluoric acid was first prepared by an unknown English glassworker in 1720. [28] Carbon, as lamp black, reacts at room temperature to yield tetrafluoromethane. [note 8] Isolation of elemental fluorine was hindered by the extreme corrosiveness of both elemental fluorine itself and hydrogen fluoride, as well as the lack of a simple and suitable electrolyte. [157] It is almost non-existent in nature, but is used in artificial compounds. Fluorine has no known metabolic role in mammals; a few plants and sea sponges synthesize organofluorine poisons (most often monofluoroacetates) that help deter predation.