Answered

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When radioactive thorium (Th) decays it emits a beta particle and produces protactinium (Pa) as seen in the nuclear equation. The atomic mass of thorium missing in the nuclear equation must be A) 233. B) 234. C) 235. D) 238.

Sagot :

delgadodorvilus

Answer:

B

Explanation:

234 i did this on usatestprep

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