Step-by-step explanation:
An alpha particles is basically a helium nucleus and it contains 2 protons and 2 neutrons.
Symbol of an alpha particle is
.
A beta particle is a particle with a negatively charged electron. Symbol of a beta particle is
.
According to the given question, the decay series chart along with reaction equation are as follows.
(a) Lead-214 changes to bismuth-214.
![^(214)_(82)Pb \rightarrow ^(214)_(83)Bi + ^(0)_(-1)e](https://img.qammunity.org/2021/formulas/chemistry/high-school/j0xo5gbuadt9gesbaan38d6y6dqa3x574a.png)
(b) Bismuth-214 changes to polonium-214.
![^(214)_(83)Bi \rightarrow ^(214)_(84)Po + ^(0)_(-1)e](https://img.qammunity.org/2021/formulas/chemistry/high-school/a25ckladotgd26ysb16j1l4m4y2dlidph3.png)
(c) Polonium-214 changes to lead-210.
![^(214)_(84)Po \rightarrow ^(210)_(82) + ^(4)_(2)He](https://img.qammunity.org/2021/formulas/chemistry/high-school/sco87bteqtzdpmsl8iarvztxc2jar1izo7.png)
Therefore, we can conclude that proper order of nuclear particle emission is beta, beta, alpha.