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(a) Why is an alpha particle, rather tha...

(a) Why is an alpha particle, rather than neutrons and protons, emitted from an unstable nucleus? (b) A nucleus `.^(A)X` alpha decays to produce Y. The vol- ume of nucleus Y is nearly 56 times the volume of alpha particle. Find the mass number (A) of X.

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The correct Answer is:
(b) A=228
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