Radium ""^(226) Ra , spontaneously decays to radon with the emission of an alpha- particle and a gamma-ray . If the speed of the alpha particle upon emission from an initially stationary radium nucleus is 1.5 xx 10^(7) m/s, what is the recoil speed of the resultant radon nucleus ? Assume the momentum of gamma ray is negligible compared to that of alpha particle

Radium ""^(226) Ra , spontaneously decays to radon with the emission o

1.	Radium ""^(226) Ra , spontaneously decays to radon with the emission of an alpha- particle and a gamma-ray . If the speed of the alpha particle upon emission from an initially stationary radium nucleus is 1.5 xx 10^(7) m/s, what is the recoil speed of the resultant radon nucleus ? Assume the momentum of gamma ray is negligible compared to that of alpha particle
Answer» `2.0 xx 10^(5)` m/s `2.7 xx 10^(5)` m/s `3.5 xx 10^(5)` m/s `1.5 xx 10^(7)` m/s ANSWER :B

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