Does a Beta(?) Particle as a whole, comprise electrons and anti-neutrino?? or just a electron??
Thanks!!!A beta particle is an electron. They're simply two different names for the same thing.
In beta decay, a neutron changes into a proton, and an electron (beta particle) and antineutrino are created. The electron and antineutrino do not exist before the decay, inside the neutron or elsewhere.
Particles get destroyed and produced. There is no deeper level here, they just can do this, and there are equations which allow to calculate this.(What happens during such 'interactions'?)