Home Physics Atomic and Nuclear Physics Nucleus, Nuclear Reaction A nuclei X with mass number A and charge num…
Physics Atomic and Nuclear Physics Nucleus, Nuclear Reaction MCQ (Single Correct)

A nuclei X with mass number A and charge number Z, disintegrates into one α-particle and one β-particle. The resulting R has atomic mass and atomic number, equal to:

A
(A – Z) and (Z – 1)
B
(A – Z) and (Z – 2)
C
(A – 4) and (A – 2)
D
(A – 4) and (Z – 1)

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The correct answer is:
D

When an -particle is emitted, mass number of nuclide is reduced to 4 , and its charge number is reduced to 2 , But when a -particle is emitted, mass number of remains the same and its charge number is increased by 1 . Hence, the resulting nuclide has atomic mass and atomic number .

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