A radioactive nucleus, QQQ, undergoes a series of radioactive decays. The first decay is shown on the grid below:
a.[1]
Identify the type of radiation emitted during the decay of nucleus Q Q\,Q to the new nucleus at (83,212)(83, 212)(83,212).
b.[1]
The new nucleus at (83,212)(83, 212)(83,212) subsequently undergoes a decay where its atomic number decreases to 81 while its mass number decreases to 208. Write down the type of radiation emitted during this second decay.