Answer
is "alpha particle only".
alpha decay is an
emission ofĀ āā“HeĀ nucleus. If an element undergoes an
alpha decay, theĀ mass numberĀ of theĀ daughter nucleus
formedĀ isĀ reduced by 4Ā compared to mass numberĀ of
parent atom andĀ atomic numberĀ isĀ reduced by 2Ā compared
to atomic number of parent atom.
Ā
PoĀ has atomic
number 84 and mass number as 214. Hence, the formed daughter atom should have
84 - 2 = 82 as the atomic number and 214 - 4 = 210 as the mass number. The
decay reaction is
āāĀ²Ā¹ā“Po
āĀ āāĀ²Ā¹ā°Pb
+Ā āā“He
