(A) The Composition of the Nucleus
Stability of Nucleus
The nucleus becomes unstable if it has too many protons, too many neutrons or too much
energy.
energy.
Radioactive Decay
1. The unstable nucleus will decay to release radioactive radiation.
2. Radioactivity is the spontaneous process of an unstable nucleus emitting radioactive
emission in order to become more stable.
emission in order to become more stable.