Iodine is used as a test for starch and turns a deep blue when it comes in contact with it. It is a soluble halogen, fairly non-reactive, exists mainly as a non-sorbing anion, and is produced by cosmogenic, thermonuclear, and in-situ reactions. 1 - Compute the mass (in grams) of a single iodine... Ch. For example, while chlorine gas will halogenate carbon monoxide, nitric oxide, and sulfur dioxide (to phosgene, nitrosyl chloride, and sulfuryl chloride respectively), iodine will not do so.
12 Due to similar destruction, 131I is the iodine radioisotope used in other water-soluble iodine-labeled radiopharmaceuticals (such as MIBG) used therapeutically to destroy tissues. Median response time is 34 minutes and may be longer for new subjects. Abnormal results may be caused by disorders such as Graves' disease or Hashimoto's thyroiditis. 1 - The americium isotope 241Am is used in smoke... Ch. 1 - The natural abundances and isotopic masses of the... Ch. 1 - In a reproduction of the Millikan oil-drop... Ch. 1 - Aluminum oxide (Al2O3) occurs in nature as a... Ch. The conversion factor used to convert atomic mass in amu to grams as follows: 1 amu = 1.6605 × 10 − 24 g Element : Symbol : Atomic Mass # of Atoms : Mass Percent: Iodine: I: 126.90447: 1: 100.000% ›› Calculate the molecular weight of a chemical compound.
Relative atomic mass: 126.904 Electron configuration: [Kr] 4d 10 5s 2 5p 5.
Suppose... Ch. Colloquially, radioactive materials can be described as "hot," and non-radioactive materials can be described as "cold." 3 Chemical and Physical Properties Expand this section. 1 - In J. J. Thompson’s experiment depicted in Figures... Ch. Following EC, the excited 123Te from 123I emits a high-speed 127 keV internal conversion electron (not a beta ray) about 13% of the time, but this does little cellular damage due to the nuclide's short half-life and the relatively small fraction of such events. Iodine-129 as a long-lived marker for nuclear fission contamination, # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (, # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (. Historically, 129I was the first extinct radionuclide to be identified as present in the early solar system. The atomic weight as printed on the periodic table is NOT the weight of a single atom in atomic mass units or grams per mole. Yahoo is part of Verizon Media. Nevertheless, it now serves as a groundwater tracer as indicator of nuclear waste dispersion into the natural environment. 1 - Vanadium (V) and oxygen (O) form a series of... Ch.
Both 123I and 125I emit copious low energy Auger electrons after their decay, but these do not cause serious damage (double-stranded DNA breaks) in cells, unless the nuclide is incorporated into a medication that accumulates in the nucleus, or into DNA (this is never the case is clinical medicine, but it has been seen in experimental animal models).[6]. 1 - A 17th-century chemist wrote of the “simple bodies... Ch. 1 - Pure nitrogen dioxide (NO2) forms when dinitrogen... Ch. 2020-10-31. 124I decays to 124Te.
For example, blockade of thyroid iodine uptake with potassium iodide is used in nuclear medicine scintigraphy and therapy with some radioiodinated compounds that are not targeted to the thyroid, such as iobenguane (MIBG), which used to image or treat neural tissue tumors, or iodinated fibrinogen, which is used in fibrinogen scans to investigate clotting. What is the best way to fold a fitted sheet? 123I, which has no beta activity, is more suited for routine nuclear medicine imaging of the thyroid and other medical processes and less damaging internally to the patient. Is there a way to search all eBay sites for different countries at once? In the history of olympic show jumping who are the people and year did they win them? These compounds contain iodine, but not in the iodide form. *Response times vary by subject and question complexity. The Commission last revised the standard atomic weight of iodine in 1985 based on the latest Atomic Mass Evaluation by IUPAP. There are some situations in which iodine-124 and iodine-125 are used in medicine, also.[3]. Iodine-129 (129I; half-life 15.7 million years) is a product of cosmic ray spallation on various isotopes of xenon in the atmosphere, in cosmic ray muon interaction with tellurium-130, and also uranium and plutonium fission, both in subsurface rocks and nuclear reactors. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. Who is the longest reigning WWE Champion of all time? ). Dates: Modify . Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*. 1 - Only two isotopes of boron (B) occur in nature;... Ch. Other elements in the same block: Both isotopes decay by electron capture (EC) to the corresponding tellurium nuclides, but in neither case are these the metastable nuclides 123mTe and 125mTe (which are of higher energy, and are not produced from radioiodine). The atomic weight is a weighted average of all of the naturally occurring isotopes of the element. Isotopic compositions and standard atomic masses from: Half-life, spin, and isomer data selected from the following sources. 1 - Soft wood chips weighing 17.2 kg are placed in an... Ch. There are instances in which cold iodide is administered to people in order to prevent the uptake of hot iodide by the thyroid gland. Excited 125Te resulting from electron capture of 125I also emits a much lower-energy internal conversion electron (35.5 keV), which does relatively little damage due to its low energy, even though its emission is more common.
The gamma-emitting isotopes iodine-123 (half-life 13 hours), and (less commonly) the longer-lived and less energetic iodine-125 (half-life 59 days) are used as nuclear imaging tracers to evaluate the anatomic and physiologic function of the thyroid. 129I differs from 36Cl in that its half-life is longer (15.7 vs. 0.301 million years), it is highly biophilic, and occurs in multiple ionic forms (commonly, I− and IO3−), which have different chemical behaviors. In hydrologic studies, 129I concentrations are usually reported as the ratio of 129I to total I (which is virtually all 127I). Iodine, isotope of mass 129, at. Atomic Mass of Iodine Atomic mass of Iodine is 126.90447 u.
Name: Iodine Symbol: I Atomic Number: 53 Atomic Mass: 126.90447 amu Melting Point: 113.5 °C (386.65 K, 236.3 °F) Boiling Point: 184.0 °C (457.15 K, 363.2 °F) Number of Protons/Electrons: 53 Number of Neutrons: 74 Classification: Halogen Crystal Structure: Orthorhombic Density @ 293 K: 4.93 g/cm 3 Color: blackish Atomic Structure ›› More information on molar mass and molecular weight.
126.904 47 (3) 1. The iodide solution SSKI, a saturated solution of potassium (K) iodide in water, has been used to block absorption of the radioiodine (it has no effect on other radioisotopes from fission). Iodine (I) Atomic Data for Iodine (I) Atomic Number = 53 Atomic Weight = 126.90447 Reference E95 : Isotope : Mass : Abundance : Spin : Mag Moment : 127 I: 126.904473: 100%: 5/2 +2.808: I I Ground State 1s 2 2s 2 2p 6 3s 2 3p 6 3d 1 0 4s 2 4p 6 4d 1 0 5s 2 5p 5 2 P 3 / 2 Ionization energy 84295.14 cm-1 (10.45126 eV) Ref. The protective effect of KI lasts approximately 24 hours, so must be dosed daily until a risk of significant exposure to radioiodines from fission products no longer exists. Instead, the excited tellurium nuclides decay immediately (half-life too short to detect). Due to preferential uptake of iodine by the thyroid, radioiodine is extensively used in imaging of and, in the case of 131I, destroying dysfunctional thyroid tissues. [9][10] Iodine-131 (the most common radioiodine contaminant in fallout) also decays relatively rapidly with a half-life of eight days, so that 99.95% of the original radioiodine has vanished after three months. The low energy of the gamma spectrum in this case limits radiation damage to tissues far from the implanted capsule.
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