Answer:
[tex] \: \boxed{ \sf \: Plutonium \: to \: Uranium \: is \: Alpha \: Decay! }[/tex]
Explanation:
Some nuclei attains more stabily by reducing their size, Alpha Decay is an example of such scenery.Nuclei having more than 210 nucleons, are so large in size hence the balancing force which prevents the repulsion between protons dominates, and due to excessive of protons lead to decay.
Consider any radioactive atom X with atomic mass A & atomic number z, when undergoes
alpha decay or radioactive emission, then the initial nucleus undergoes Excited state, and while returning to ground state it emits Gamma Radiation.
[tex]\boxed{\sf X_z^A \rightarrow Y_{z-2}^{A-4}+He_2^4+ \gamma }[/tex]
Given,
Parent nuclei X = Pu(A= 240, z=94)
Daughter nuclei Y = U(A= 236, z=92)
[tex]\sf Pu_z^A \rightarrow U_{z-2}^{A-4}+He_2^4 \\ \sf Pu_{94}^{240} \rightarrow U_{94 - 2}^{240 - 4}+He_2^4 \\ \sf Pu_{94}^{240} \rightarrow U_{92}^{236}+He_2^4 [/tex]
Hence the given fission of plutonium to uranium is Alpha Decay!
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