Consider the following decay series: Which type of nuclear process occurs in steps c and d, respectively?

Question

Consider the following decay series:  Which type of nuclear process occurs in steps c and d, respectively?

Quizplus · Accepted Answer

In step c, F1F1F1S1βF1F1F10 emission occurs, which means a beta particle (F1F1F1S1-) is emitted from the nucleus, resulting in the atomic number increasing by one. 
In step d, F1F1F1S1αF1F1F10 emission occurs, which means an alpha particle (F1F1F1S1α) is emitted from the nucleus, resulting in the atomic number decreasing by two and the mass number decreasing by four.

Consider the Following Decay Series: Which Type of Nuclear α\alphaα

Consider the Following Decay Series: Which Type of Nuclear $\alpha$