Q.

As a result of radioactive decay a  92U238 nucleus is changed to a  91U234 nucleus. Which particles are emitted in the decay?

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a

One proton and two neutrons

b

One α−particle and one β−particle

c

Two β−particles and one neutron

d

Two β+−particles and one proton

answer is B.

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Detailed Solution

The α−emission decreases z by 2 and A by 4 and β− emission increases z by 1 and A remains unchanged.
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As a result of radioactive decay a  92U238 nucleus is changed to a  91U234 nucleus. Which particles are emitted in the decay?