QJEEM03Ch097e: JEE Main 2003 Chemistry - Class 12 JEEM03Ch097e Solution: The radionucleide 90 234 T h undergoes two successive β -decays …

Question

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The radionucleide

_{90}^{234} T h

undergoes two successive

β

-decays followed by one

α

-decay. The atomic number and the mass number respectively of the resulting radionucleide are

Accepted Answer

_{90}^{234} T h \overset{- β}{⟶}_{91}^{234} X \overset{- β}{⟶}_{92}^{234} T h \overset{- α}{⟶}_{90}^{230} T h

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