The uranium isotope 235U can fission—break into two smaller-masscomponents and free neutrons—if it is struck by a free neutron. A typical reaction is 1/0n + 235/92U → 141/56Ba + 92/36Kr + 3/1/0nAs you can see, the subscripts (the number of protons) and the superscripts (the number of nucleons) “balance” before and after the fission event; there is no change in the number of protons or neutrons. Significant energy is released in this reaction. If a fission event happens in a large chunk of 235U, the neutrons released may induce the fission of other 235U atoms, resulting in a chain reaction. This is how a nuclear reactor works. The number of neutrons required to create a stable nucleus increases with atomic number. When the heavy 235U nucleus fissions, the lighter reaction products are thus neutron rich and are likely unstable. Many of the short-lived radioactive nuclei used in medicine are produced in fission reactions in nuclear reactors. | What statement can be made about the masses of atoms inthe above reaction?A. m(U) > m('Ba) + m(Kr) + 2m(¿n)B. m(U)

The given reaction is; n01+ 92235U→ 56141Ba+ 3692Kr+3 01n In the nuclear fission process, the…

Answered: | What statement can be made about the…

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| What statement can be made about the masses of atoms in the above reaction? A. m(U) > m('Ba) + m(Kr) + 2m(¿n) B. m(U)

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Question

The uranium isotope ²³⁵U can fission—break into two smaller-mass
components and free neutrons—if it is struck by a free neutron. A typical reaction is
1/0n + 235/92U → 141/56Ba + 92/36Kr + 3/1/0n
As you can see, the subscripts (the number of protons) and the superscripts (the number of nucleons) “balance” before and after the fission event; there is no change in the number of protons or neutrons. Significant energy is released in this reaction. If a fission event happens in a large chunk of ²³⁵U, the neutrons released may induce the fission of other ²³⁵U atoms, resulting in a chain reaction. This is how a nuclear reactor works. The number of neutrons required to create a stable nucleus increases with atomic number. When the heavy ²³⁵U nucleus fissions, the lighter reaction products are thus neutron rich and are likely unstable. Many of the short-lived radioactive nuclei used in medicine are produced in fission reactions in nuclear reactors.

| What statement can be made about the masses of atoms in
the above reaction?
A. m(U) > m('Ba) + m(Kr) + 2m(¿n)
B. m(U) <m('Ba) + m(Kr) + 2m(on)
C. m(U) = m(Ba) + m(Kr) + 2m(,n)
D. m(²3¿U) = m('Ba) + m(¾Kr) + 3m(ón)
(235
235
141
56
141-
56
141-
56
235

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