JEE Main · 2007 · 29 Apr 2007 · Offline · Chemical Kinetics

Which of the following nuclear reactions will generate an isotope?

(A)neutron particle emission✓ Correct
(B)positron emission
(C) $α$ -particle emission
(D) $β$ -particle emission

Answer: (A)

Solution

An isotope has the same atomic number but a different mass number. Emission of a neutron leaves the proton number untouched and lowers the mass number by one,

_{Z}^{A} X \to_{Z}^{A - 1} X +_{0}^{1} n

, so the product is an isotope of the original element. The other decays listed change the atomic number and so give a different element.

JEE Main · 2007 · 29 Apr 2007 · Offline · Single correct option

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