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| style="height:20px; width:300px; text-align:center;" |This [[Atomic Nucleus|nucleus]] is [[Unstable Isotope|unstable]] because it is too [[massive]] or has too few [[neutron]]s relative to [[proton]]s so it [[Radioactive Decay|decays]] via [[Alpha Radiation|alpha emission]] reducing the [[Relative Atomic Mass|atomic mass]] by 4 and the [[Atomic Number|atomic number]] by 2.
| style="height:20px; width:300px; text-align:center;" |This [[Atomic Nucleus|nucleus]] is [[Unstable Isotope|unstable]] because it is too many [[neutron]]s so it [[Radioactive Decay|decay]]s via [[Beta Radiation|beta emission]] in which a [[neutron]] turns into a [[proton]] increasing the [[Atomic Number|atomic number]] by 1.
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