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The use of fast neutrons in so-called ‘fast reactors’ allows for the production of more fissile nuclei than are destroyed, as the absorption of at least one neutron per fission by an uranium 238 nucleus transforms this uranium 238 … Uranium is atomic number 92 - this means it has 92 protons - which in a neutral atom means it also has 92 electrons. Amount of Negative Charge. The mass-number [math]A=238[/math] is the addition of the number of protons plus the number of neutrons: [math]A = Z+N[/math], hence [math]N = A-Z = 238 - 92 = 144[/math]. 92 B. U-238 has 146 neutrons in the nucleus, but the number of neutrons can vary from 141 to 146. answer choices . The number of protons in the atom can be found with the atomic number (uranium has an atomic number of 92). uranium-238 is the most abundant uranium isotope. Fast neutrons are needed to eliminate these waste products. Doubling time Because uranium is radioactive, it is constantly emitting particles and changing into other elements. Tags: Question 4 . Only 1 neutron is needed for the fission chain reaction to be stable, so the remaining 1.4 neutrons (on average) could be used for the breeding of uranium-238. It has an atomic number of 92, meaning that it has 92 protons. Report an issue . Neutron capture by one of the uranium isotopes will form what are called transuranic elements, actinides beyond uranium in the periodic table. 146 C. 238 D. 330 120 seconds . Ability to Form Ions. Which of the following distinguishes the isotope uranium-238 from the isotope uranium-235? Atomic Number – Protons, Electrons and Neutrons in Uranium. SURVEY . Number of Neutrons in the Nucleus. The number of electrons is the same as the number of protons in an atom with no charge (which we are assuming in this problem), so there are also 92 electrons. Since U-238 is the major proportion of the fuel element material in a thermal reactor, capture of neutrons by U-238 and the creation of U-239 is an important process. Uranium is a chemical element with atomic number 92 which means there are 92 protons in its nucleus.Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. 235 and 238 are the mass numbers (or nucleon number) of … Uranium has an atomic number of 92 which means there are 92 protons and 92 electrons in the atomic structure. “Uranium” is a synonym of “92 protons”, therefore [math]Z=92[/math]. The number 1.4 is based off of the average number of neutrons given off by a fission reaction of uranium-235, which is 2.4. Location on the Periodic Table. Uranium - 238 has an atomic number of 92. how many neutrons does uranium 238 have A. This Uranium 238 isotope is the most common, and its mass number, the sum of the protons and neutrons in the nucleus of one atom of uranium, is 238 (usually notated as U238). 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