Answer:
Uranium is element 92, so unionized, it has 92 protons and electrons. U-235 is an isotope with a total of 235 nucleons, so subtract 92 to get 143 neutrons.
Explanation:
Uranium-235 is composed of 92 protons, 143 neutrons, and 92 electrons.
An electron is a negatively charged subatomic particle.
Uranium-235 is a naturally occurring isotope of uranium, an element characterized by having 92 protons in its nucleus.
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.
Thus, Uranium-235 is composed of 92 protons, 143 neutrons, and 92 electrons.
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