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Identify the unknown isotope X in the following decays

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Identify the unknown isotope X in the following decays.

Part A

234U→X+α.

(1) 235U

(2)230Th

(3)228Th

(4)239Pu

Part B

32P→X+e−

(1)32S

(2)30P

(3)35Cl

(4)31P

Part C

X→30Si+e+

(1)32S

(2)30P

(3)35Cl

(4)31P

Part D

24Mg→X+γ

(1)24Na

(2)23Na

(3)24Mg

(4)26Al