Unstable nuclei will undergo radioactive decay in which particles and/or electromagnetic radiation are emitted.

In Alpha decay, an unstable nucleus emits an Alpha particle

In Beta minus decay, an unstable nucleus emits an Electron

Above, a Neutron decays into a Proton + an Electron + an Anti-Neutrino
This is one type of Weak Force interaction

In Beta plus decay, an unstable nucleus emits a Positron

Above, a Proton decays into a Neutron + a Positron + a Neutrino
This is another type of Weak Force interaction

Lectures

• Lecture - Radioactive decay

Videos

• Crash course, radioactive decay
• Prof Dave - Nuclear reactions
• Fermilab, types of radioactive decay
• Veritasium, Radiation vs radioactive decay

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