Answer:
The heaviest emission is the alpha particle
Step-by-step explanation:
There are three types of fundamental radioactive emissions. The alpha particle, beta rays and gamma rays,
Gamma rays They are high energy electromagnetic waves, their plus is zero
The beta rays are electors of different energy, their mass is the mass of the electron me = 9.1 10-31 Kg
The alpha particles are a joint set of 2 proton and 2 neutron particles that are expelled from the nucleus, their mass is equivalent to the mass of a Helium nucleus approximately the mass of 4 protons (4 x1.67 10-27 Kg). We can see that the heaviest is this