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The image shows a model of a nuclear reaction. Which objects could hit other atoms, producing a chain reaction?

User Dllhell
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Final answer:

In a nuclear reaction, atoms hit other atoms and cause a chain reaction. In the case of U-235 fission, when an atom absorbs a neutron, it can split into two new atoms and release neutrons. These neutrons can then hit other atoms and continue the chain reaction.

Step-by-step explanation:

In a nuclear reaction, the chain reaction occurs when one atom hits another atom and causes it to undergo fission. This fission releases multiple high-energy neutrons that can go on to hit and split more nuclei, continuing the chain reaction. In the case of U-235 fission, for example, when a U-235 nucleus absorbs a neutron, it can split into two new atoms, releasing three neutrons. One of those neutrons may be absorbed by U-238 or escape, but if one neutron collides with another U-235 atom, it can initiate fission and release more neutrons, continuing the chain reaction.

User Turning
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