Question

A nucleus with mass number `220` initially at rest emits an `alpha`-particle. If the Q-value of the reaction is `5.5 MeV`, calculate the kinetic energy of the `alpha`-particle.
(a) 4.4 MeV (b) 5.4 MeV (c) 5.6 MeV (d) 6.5 MeV
A. 4.4
B. 5.4
C. 5.6
D. 6.5

Answer 1

Correct Answer - B
`K.E_(alpha)=((A-4)/(A))Q=(216)/(220)xx5.5=5.4 MeV`