Intro to radioactive decay | Physics | Khan Academy

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During radioactive decay, an unstable nucleus (the "parent") spontaneously changes to become a different nucleus (the "daughter"), emitting radiation in the process. The nuclear radiation emitted during radioactive decay is high energy, ionizing radiation. Nuclear radiation is potentially dangerous to living things but also has many beneficial applications. Types of radioactive decay include alpha, beta, and gamma.

Sections:
00:00 - Intro
00:22 - Chemical reactions don't change elements
01:35 - Nuclear composition
02:11 - Isotopes
04:00 - What is radioactivity?
05:38 - Example of radioactive decay
06:40 - Ionizing radiation

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