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how many neutrons in stable re 185

how many neutrons in stable re 185

A value of 0.41 +- 0.04 was obtained. D) 75 protons, 110 neutrons. The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. Review 2000 (IUPAC Technical Report)", "Atomic weights of the elements 2005 (IUPAC Technical Report)", https://en.wikipedia.org/w/index.php?title=Isotopes_of_rhenium&oldid=961405441, Articles to be expanded from October 2019, Creative Commons Attribution-ShareAlike License. 75 protons, 75 neutrons b. EVIDENCE FOR INTERMEDIATE-STATE STRUCTURE FROM RESONANCE NEUTRON CAPTURE IN $sup 185$Re AND $sup 187$Re. b.75 protons, 130 neutrons. 185 Re: 186 W 28.43% stable Standard atomic weight A r, standard (W) 183.84(1) Naturally occurring tungsten (74 W) consists of five isotopes. Rev., C 4: No. Rhenium-185 has in its nucleus Rhenium-185 has in its nucleus A) 75 protons, 75 neutrons. The U.S. Department of Energy's Office of Scientific and Technical Information EVALUATION OF $sup 185$Re AND $sup 187$Re NEUTRON CROSS SECTIONS FOR THE ENDF/B LIBRARY. [Re--Os. While neutrons in stable nuclei can exist for an eternity, a free neutron hangs around for about 15 min before it decays via the weak interaction to a proton, an electron and an antineutrino. Re-185 isotope is used for research in nuclear physics; Re-185 isotope is used for Rhenium-186 (Re-186 isotope, 186Re isotope) radionuclide (radioisotope) production (can be used in life science for healthcare and medical applications and pharmaceuticals industries); A thermal neutron is a free neutron with a kinetic energy of about 0.025 eV (about 4.0×10 −21 J or 2.4 MJ/kg, hence a speed of 2.19 km/s), which is the most probable energy at a temperature of 290 K (17 °C or 62 °F), the mode of the Maxwell–Boltzmann distribution for this temperature. Too many protons (or too few neutrons) in the nucleus result in an imbalance between forces, which leads to nuclear instability. e.not enough information … Rhenium-185 has 75 protons and 110 neutrons in its nucleus while rhenium-187 has 75 protons and 112 neutrons. The inelastic neutron-scattering cross section of {sup 187}Os has been determined in a time-of-flight experiment at the Karlsruhe 3.7-MV Van de Graaff accelerator. Rhenium-185 has in its nucleus. Get Answer. In a search for intermediate structure, neutron time-of-flight spectra corresponding to 1 and 4 MeV capture γ-ray thresholds were measured for the target isotopes 185, 187 185, 187 Neutron physics of the Re/Os clock. The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. The element with atomic number 75 is Rhenium (Re). Which among the following represent a set of isotopes? 4, 1466-72(Oct 1971). Mass percent and moles 7. So you know that the atomic number is 75 and the mass number is 186 so subtract those values to get 111 and that will be your neutrons … CROSS SECTIONS OF THE REACTIONS $sup 186$W(n,2n)$sup 185$W, $sup 184$W(n,$gamma$)$sup 185$W, $sup 186$W(n,$gamma$W$sup 187$W FOR FISSION NEUTRONS AND $sup 186$W(n,2n)$sup 185$W AND $sup 182$W(n,2n)$sup 181$W FOR 14.8-Mev NEUTRONS. Neutron-induced fission: 235 U(n,f) 134 Te+ 99 Zr+3n +185 MeV n th n p γ p How neutrons are born 1. How many neutrons make up one - 3459274 One of the most stable types of potassium atoms has the mass number 39. It is obvious the infinite multiplication factor in a multiplying system is a measure of the change in the fission neutron population from one neutron generation to the subsequent generation. The element with atomic number 75 is Rhenium (Re). 31 Y 2-is isoelectronic with which atom below? `8`8'Re NEUTRON RESONANCES 97 TABLE 4 Comparison of measured neutron widths with previously measured values for `8' Re Resonance 2g1(meV) energy (eV) this work Ideno et al.') o. Re-183 00 Re-187 i. Re-189 e. Re-181 Y. Re-190 t8C.2 . Atomic mass of Fluorine is 18.9984 u.. There are many unstable isotopes of Rhenium but Rhenium 185 is the only stable isotope. a. α d. γray b. β e. X-ray c. positron Number of Neutrons: 111: Number of Electrons: 75: Melting Point: 3180.0° C: Boiling Point: 3627.0° C: Density: 21.02 grams per cubic centimeter: Normal Phase: Solid: Family: Transition Metals: Period: 6: Cost : $250 per troy ounce . b) BNL-325 1) 24.9 0.150.01 0.13003 0.1310.010 0.1310.010 … Spring shall plant and autumn garner to the end of time." Currently, rhenium alloys are used in the engines of fighter jets.Did you know… We have over 200 college Rhenium-185 has in its nucleus. Given that 37.1% of natural rhenium is rhenium-185, which is the other stable isotope? This Site Might Help You. 37: Atomic Number: Rb: Element Symbol: Rubidium: Element Name: 85.48: Average Atomic Mass: The atomic weight is basically a measurement of the total number of particles in an atom 's nucleus including both protons and neutrons. 5. Favorite Answer. The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. Anyone can earn . And when you're writing nuclear equations, you're representing only the nuclei here, so for example, on the left side of my nuclear equation, I have carbon-14, we're talking about only the nucleus, so we're talking about six protons and eight neutrons in the nucleus. Re-185 is used for the production of Re-186 which is used for bone pain palliation. Find the Number of Neutrons Cr. The sum of the masses of the two isotopes is 371.9087 .Find the masses of the individual isotopes. 75 protons, 130 neutrons c. 130 protons, 75 neutrons d. 75 protons, 110 neutrons e. not enough information The element rhenium (RE) exists as two stable isotopes and 18 unstable isotopes. Answer Save. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure.The chemical symbol for Fluorine is F. Atomic Mass of Fluorine. A precise measurement of the neutron’s lifetime is important for calculating the rates at which lighter elements were formed immediately after the Big Bang in a process called nucleosynthesis. If the most stable ion of the isotope forms the compound MgX 2, how many neutrons does X have? Fnesenhahn et al. Among elements with a known stable isotope, only indium and tellurium similarly occur with a stable isotope in lower abundance than the long-lived radioactive isotope.. I have this project due tomorrow on rhenium. 75 C. 130 D. 185 Get the answers you need, now! This process is called radioactive decay. ( ) spin value – Indicates spin with weak assignment arguments. How many collisions are required to reduce the neutron’s energy to at least 0.040 eV, which is the energy of a thermal neutron? 2 Answers. crucial step in the interpretation of the {sup 187}Os/{sup 187}Re pair as a cosmochronometer. View the step-by-step solution to: Question 14)___ The number of neutrons in a 185 Re 4+ ion is A) 185 B) 75 C) 110 D) 71. The atomic weight of Re-185 is 185.0 u, and the atomic weight of Re-187 is 187.0 u. a) 35 b) 45 c) 46 d) 70 e) 81 6. Sep 15 Re-187 can be used for the production of Re-188 which is used for cancer therapy and restenosis, though most Re-188 is produced via W-186. Atomic nuclei containing: 20 protons and 20 neutrons; 21 protons and 19 neutrons; 22 neutrons and 18 protons; 20 protons and 22 neutrons; 21 protons and 20 neutrons; How many protons, neutrons, and electrons … When they decay, they release particles that may be harmful. Rhenium-185 has in its nucleus Select one: a. # – 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 (. Alpha-induced reactions: 9Be α,n) 12 C +5.7 MeV 2. Information on the inelastic channel is required for reliable calculations of the so-called stellar enhancement factor, by which the laboratory cross section of {sup 187}Os must be corrected in order to account for the thermal population of low-lying excited states at the temperatures of s-process nucleosynthesis, in particular of the important state at 9.75 keV. The 83rd element, bismuth, was traditionally regarded as having the heaviest stable isotope, bismuth-209, but in 2003 researchers in Orsay, France, measured the half-life of 209 Bi to be 1.9 × 10 19 years.

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