In a given reaction, ^ A _ Z X ^ A _ Z+1 Y ^ A-4 _ Z-1 K ^ A-4 _ Z-1 K the radioactive radiations are emitted in the sequence of

Step-by-step solution

In the first step, ^ A _ Z X ^ A _ Z+1 Y , the mass number remains unchanged while the atomic number increases by 1 . This indicates the emission of a particle. In the second step, ^ A _ Z+1 Y ^ A-4 _ Z-1 K , the mass number decreases by 4 and the atomic number decreases by 2 . This indicates the emission of an particle. In the third step, ^ A-4 _ Z-1 K ^ A-4 _ Z-1 K , both the mass number and the atomic number remain unchanged, which corresponds to the emission of a ray. The sequence of emitted radioactive radiati