<P> Francium - 221 has a half - life of 4.8 minutes . It is the ninth product of the neptunium decay series as a daughter isotope of actinium - 225 . Francium - 221 then decays into astatine - 217 by alpha decay ( 6.457 MeV decay energy ) . </P>
<P> Francium - 221 has a half - life of 4.8 minutes . It is the ninth product of the neptunium decay series as a daughter isotope of actinium - 225 . Francium - 221 then decays into astatine - 217 by alpha decay ( 6.457 MeV decay energy ) . </P>
in the alpha decay of francium-221 what daughter element is produced
in the alpha decay of francium-221 what daughter element is produced
astatine - 217
astatine - 217