What is radioactivity?

Radioactivity is fission phenomenon producing two new nuclei plus a residual fundemental particle or a bonded system of fundemental particles.

Radioactivity is the nucleus fission (brake up) phenomenon producing two new nuclei plus a residual fundemental particle or a bonded system of fundemental particles that are all smaller in i) size, ii) mass, iii)) charge from the formerly nucleus (the radioactive one) .

The fundemanlat particles or the bonded system may be known as alpha (##alpha##), beta (##beta##) or gamma (##gamma##) particles in general.

These are the most known residues. Alpha is the nucleus of a Helium (##""_2^4 He##) atom which consists of 2 protons and 2 neutrons -bonded - together. The electrons are free of the nucleus and the nucleus stands itself.

Beta is the anti-particle of the famous known "electron". It has the same mass and the negative charge of an an electron which means that ##m_e = m_beta## but ##q_e = -q_beta##.

Gamma is the famous known "photon" which is the quanta of light or the particle view of an electromagnetic wave (like light or x-rays etc.)