what particle decay is this? 210 Bi→ 83 210 Po + ___

Question

What particle decay is this

210 Bi--> 83 210 Po + ____

Answer 1

Notice, the molecular weight did not change, but we have one more proton as Bi, has become Po. This indicates that a beta decay occurred, where one neutron decays into a proton and an electron and the electron is emitted.

The unknown particle is an electron e^1-

Hope that helps!