Class 12 NEET Physics Atoms and Nuclei Part 1

On emission of one α -particle, atomic number decreases by 2 units and atomic mass number decrease by 4 units.
Here, decrease in mass number =200−168 =32
∴ Number of α -particles =

32

4

=8
While the emission of β -particle does not effect the mass number and atomic number increases by 1 unit.
∴ Number of β -particles =16−10=6