5.3 Radioactivity Results from an Imbalance of Forces

How the Nucleus Is Held Together

A discussion of how the strong nuclear force and the electric force compete with each other in the atomic nucleus. Duration: 4:01.

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Neutrons Need Protons

The role that neutrons play in holding an atomic nucleus together is discussed. Notably, there is a limit to the number of neutrons that a nucleus may contain. Duration: 4:07.

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The Size of the Nucleus Is Limited

Reasons for why there is a limit to the size of the atomic nucleus are discussed. Duration: 2:46.

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A Friend Asked Me Once

The author answers the question of why it is that radioactivity can't simply be neutralized. Duration: 2:15.