It is extremely radioactive; its most stable isotope, francium-223 (originally called actinium K after the natural decay chain it appears in), has a half-life of only 22 minutes. IR4-I-02 , IR4-I-025 , IR4-I-03 , IR4-I-035 , IR4-I-04 , IR4-I-05 CAS #: 7790-45-6 Relevant identified uses of the substance: Scientific research and development Supplier details: American Elements 10884 Weyburn Ave. SECTION 1. Prior to its discovery, it was referred to as eka-caesium. Francium oxide is an ionic compound with the formula Fr [math]_2 [/math] O. Tricesium triiodide. Why is Mary Warren now so self-confident? This means neither stable nor radioactive iodine can enter. The isotopes of francium decay quickly into astatine, radium, and radon. FIRST-AID MEASURES Eyes In case of eye contact, rinse with plenty of water and seek medical attention. The reaction would probably sbe faster than that of caesium - in other words dangerously quick. Production. Caesium iodide or cesium iodide (chemical formula CsI) is the ionic compound of caesium and iodine.It is often used as the input phosphor of an X-ray image intensifier tube found in fluoroscopy equipment. Formula of Potassium Oxide is K^2O Valency of Potassium =1 (as its atomic no. All rights reserved. 2Fr(s) + H2SO4(aq) → 2Fr+(aq) + SO42-(aq) + H2(g). Who is the longest reigning WWE Champion of all time? Francium is very scarce and expensive. Cesium iodide (Cs2I2) Cesium iodide (Cs3I3) UNII-U1P3GVC56L. Uranium triiodide is an inorganic compound with the chemical formula UI 3.It is a black solid that is soluble in water. IODIDE SUPPLEMENT. Potassium iodide is a metal-halide salt featuring an ionic bond between the potassium cation (K +) and the iodide anion (I –). What is the chemical formula for francium iodide. Most probably, it is assumed that about 340-550 gms of this metal francium are found in the earth’s crust. Formula: ClFr: Element System: Cl-Fr: Element Names: Chlorine, Francium: Molecular Weight: 258.473 g / mol: Name(s): Francium chloride Francium chloride (FrCl) CAS-RN: 7789-17-5. Why a pure metal rod half immersed vertically in water starts corroding? It is produced both by naturally and by artificial methods. KI (potassium iodide) is a salt of stable (not radioactive) iodine that can help block radioactive iodine from being absorbed by the thyroid gland, thus protecting this gland from radiation injury.. Iodide is the ion form of iodine, occurring when iodine bonds with another element, such as potassium. How long will the footprints on the moon last? When the reaction is conducted in tetrahydrofuran (THF), the product is the blue UI 3 (THF) 4.. Properties. Iodide definition, a salt of hydriotic acid consisting of two elements, one of which is iodine, as sodium iodide, NaI. So far as I know, nobody has ever assembled enough francium in one place to know for certain its appearance. There is one hugely important difference, and that is that francium has no stable isotopes; its most stable one has a half-life of 22 minutes. Were francium ever to be burned in air, the result is expected to be francium superoxide, FrO2. It is the second-most electropositive element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Copyright 1993-2020 Mark Winter [ The University of Sheffield and WebElements Ltd, UK]. WebElements: THE periodic table on the WWW [www.webelements.com] CESIUM IODIDE. Sodium iodide activated with thallium, NaI(Tl), when subjected to ionizing radiation, emits photons (i.e., scintillate) and is used in scintillation detectors, traditionally in nuclear medicine, geophysics, nuclear physics, and environmental measurements. What is Potassium Iodide (KI)? The resulting solution would be basic because of the dissolved hydroxide. Ionic compounds form hard crystals. Francium is an element with chemical symbol Fr and atomic number 87 in the periodic table. Synonym: 1-Ethyl-2-[(1-ethyl-2(1H)-quinolinylidene)methyl]quinolinium iodide, Decynium 22, Pseudocyanine iodide, Pseudoisocyanine iodide Empirical Formula (Hill Notation): C 23 H 23 IN 2 Molecular Weight: 454.35