“Nuclear fission is the process where a heavy atomic nucleus, such as uranium-235 or plutonium-239, absorbs a neutron, becoming unstable. This leads to the nucleus splitting into two lighter nuclei, called fission fragments, and releasing several neutrons along with a substantial amount of energy. The energy release is due to the mass-energy equivalence principle ( 𝐸 = 𝑚 𝑐 2 E=mc 2 ). The emitted neutrons can induce further fission events, creating a chain reaction. This reaction is harnessed in nuclear reactors for energy production and in nuclear weapons for explosive power. Key terms: neutron absorption, nucleus instability, fission fragments, chain reaction, mass-energy equivalence.”

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