Uranium-238 isotope is most common isotope of uranium found on Earth (about 99.28% of the entire Earth’s uranium is basically U-238). What do these isotopes of carbon all have in common? Get the answers you need, now! A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. answer choices . Which of the following is not a criterion to make a nuclear bomb? Uranium 235, which alone constitutes 0.72% of natural uranium is the second common isotope of uranium in the nature. 60 seconds . cenzzzzzzzzie cenzzzzzzzzie 05/14/2020 Physics High School +5 pts. Answered Uranium-235 has 92 protons. atomic number and neutrons. The half-life of uranium 238 is of 4.5 billion years, while uranium 235 has a … See answer the choices are 92, 93, 143, or 235 harmonympaull harmonympaull All isotopes of uranium are unstable and radioactive, but uranium 238 and uranium 235 have half-lives which are sufficiently long to have allowed them to still be present in the Solar System and indeed on Earth. A) 92 B) 143 C) 235 D) 327 56. Tags: How many neutrons does it have? Uranium 235 definition, the radioactive uranium isotope having a mass number of 235, comprising 0.715 percent of natural uranium. answer choices . 143. It is assigned the chemical symbol U. Uranium has the highest atomic weight (19 kg m) of all naturally occurring elements. The atomic number, #Z#, of any element, is the number of protons, positively charged nuclear particles, contained in the nucleus.The mass number (#235#) is the sum of the number of protons, AND the number of neutrons, NEUTRALLY charged nuclear particles.Note that only protons and neutrons contribute to atomic mass to any degree.. You have #""^235U#.If #Z=92# how many neutrons … Uranium-235 (235 U) is an isotope of uranium making up about 0.72% of natural uranium.Unlike the predominant isotope uranium-238, it is fissile, i.e., it can sustain a fission chain reaction.It is the only fissile isotope that exists in nature as a primordial nuclide.. Uranium-235 has a half-life of 703.8 million years. How many neutrons does a uranium-235 nucleus have? Q. Name: Uranium Symbol: U Atomic Number: 92 Atomic Mass: 238.0289 amu Melting Point: 1132.0 °C (1405.15 K, 2069.6 °F) Boiling Point: 3818.0 °C (4091.15 K, 6904.4 °F) Number of Protons/Electrons: 92 Number of Neutrons: 146 Classification: Rare Earth Crystal Structure: Orthorhombic Density @ 293 K: 18.95 g/cm 3 Color: silverish Atomic Structure Uranium is a silvery-white metallic chemical element in the periodic table, with atomic number 92. How many neutrons does it have? Tags: Question 5 . Radioactive isotope technetium-99m has a half-life of 6 hours. This isotope has half-life of 7.04×10 8 years (6.5 times shorter than the isotope 238) and therefore its abundance is lower than 238 U (99.28%). 235 U belongs to primordial nuclides, because its half-life is comparable to the age of the Earth (~4.5×10 9 years). neutrons = 143 . protons, atomic number, and mass number. SURVEY . neutrons & mass number. Uranium has 92 protons and either 143 or 146 neutrons, for uranium-235 and uranium-238 respectively. A) fissionable material B) excess production of neutrons C) nuclear chain reaction D) source of neutrinos to trigger explosion 57. 146. It was discovered in 1935 by Arthur Jeffrey Dempster. A uranium nucleus has 92 protons. As all uranium nuclei have 92 protons, the nucleus of a uranium-235 atom will also have 143 neutrons to give it a total atomic mass number of 235. 55. Answer and Explanation: Uranium-235 is an isotope of Uranium-238, all this means is that Uranium-235 has the same number of protons and electrons as Uranium-238, but a different number of neutrons. How many neutrons does the isotope uranium-235 have - Answer . 92. electrons = 92. 238. When bombarded with neutrons it undergoes fission with the release of energy. Uranium 235. How many neutrons does uranium-235 have? There are some good answers here, but I'll address uranium specifically. atomic number and electrons. 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