Stable and Unstable Nuclei | Radioactivity | Physics | FuseSchool

Stable and Unstable Nuclei | Radioactivity | Physics | FuseSchool
How do you know if an atom is stable? In this video we are going to learn about radioactive decay and that unstable nuclei either have too many protons or too many neutrons, which upsets the strong nuclear forces holding the atom together. Unstable nuclei try to balance themselves by giving off the excess proton or neutron either through alpha, beta minus or beta plus decay.
0:00 Introduction
0:13 Atom composition
0:45 Stable nuclei
1:06 Unstable nuclei
1:25 Radioactive decay
1:43 Alpha decay
2:11 Beta-minus decay
2:50 Beta-plus decay
3:18 Determine if the atom is stable or unstable
4:22 Summary
CREDITS
Design & Animation: Bing Rijper
Narration: Dale Bennett
Scripts: Bethan Parry
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Good explanation of the basics, radioactivity is a weight-adjusting phenomenon for the nucleus. In really large nucleii, i.e. above atomic number Z=90 (thorium) another decay method, fission, can happen spontaneously but it is very slow compared to the other decay modes.

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thank you for the video. How is alpha radiation helping to balance the neutron-proton ratio though? if they give out the same number (2) for each of proton and neutron?

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