A radioactive nucleus, PPP, undergoes a series of radioactive decays. The first decay is shown in the grid below: 
a.[2]
Identify the type of radiation emitted during the decay of nucleus PPP to the new nucleus at (82,210)(82, 210)(82,210).
b.[2]
The new nucleus at (82,210)(82, 210)(82,210) subsequently undergoes a decay where its atomic number increases to 838383 while its mass number remains 210210210. Write down the type of radiation emitted during this second decay.