Answer:
Pb-210 that lead-210 is the product of second step.
Explanation:
Alpha decay : When a larger nuclei decays into smaller nuclei by releasing alpha particle. In this process, the mass number and atomic number is reduced by 4 and 2 units respectively.
General representation of alpha decay :
Beta decay : In this process, a neutron is converted into a proton and an electron. In this decay, the atomic number is increased by 1 unit.
General representation of beta decay :
Step 1. Bi undergoes α decay;
81 = Z-2
Z = 83
210 = A - 4
A = 214
Step 2: Tl-210 undergoes β decay:
Pb-210 that lead-210 is the product of second step.
Theyre the big bunched up group in the middle of the periodic table