What is the daughter nucleus (nuclide) produced when Pb211 undergoes beta decay by emitting an electron?

Answer 1

In β^- decay, a neutron is converted into a proton, electron, and electron-antineutrino, which increases the atomic number of the nuclide by 1. For ²¹¹Pb, this would result in a nuclide of ²¹¹Bi.