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The radionucleide _{90}^{234}\textrm{}  Th undergoes two successive \beta- decays followed by one \alpha- decay.  The atomic number and the mass number respectively of the resulting radionucleide are

  • Option 1)

    92 and 234

  • Option 2)

    94 and 230

  • Option 3)

    90 and 230

  • Option 4)

    92 and 230

 

Answers (1)

best_answer

As we learned

\beta - decay -

It is a type of radioactive decay in which \alpha\: \beta rays and a neutrino are emitted  from an atomics nucleus.

- wherein

 \betadecay of an neutron transform it in to a proton by emission of an electron .

 

 

^{234}_{90}Th\overset{-\beta }{\rightarrow}\: \overset{-\beta }{\rightarrow}\: \: _{234}^{a_{2}}X\: \overset{-\alpha }{\rightarrow}\: \: _{90}^{230}Y


Option 1)

92 and 234

Option 2)

94 and 230

Option 3)

90 and 230

Option 4)

92 and 230

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satyajeet

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