Q.

A uranium nucleus (atomic number 92, mass number 238) emits an  α particle and the resultant nucleus emits a β-particle.  If  Z and A are the atomic and mass numbers of the final nucleus, then

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a

Z=234

b

Z=91

c

A=233

d

Z=90

answer is B, C.

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Detailed Solution

 92238X α90Y234β91Z234

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A uranium nucleus (atomic number 92, mass number 238) emits an  α− particle and the resultant nucleus emits a β−-particle.  If  Z and A are the atomic and mass numbers of the final nucleus, then