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Answer:

When Pu-239 releases an alpha particle, it loses 2 protons and 2 neutrons so it becomes U-235.

The energy (in mev) released in the alpha decay of 239pu will be equal to 5.156 Mev.

What is plutonium 239?

Plutonium-239 (239Pu, Pu-239) is an isotope of plutonium. Plutonium-239 is the primary fissile isotope used for the production of nuclear weapons, although uranium-235 is also used for that purpose.

Plutonium-239 is also one of the three main isotopes demonstrated usable as fuel in thermal spectrum nuclear reactors, along with uranium-235 and uranium-233. Plutonium-239 has a half-life of 24,110 years

Here the energy (in mev) released in the alpha decay of 239pu will be equal to 5.156 Mev.

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