TED-Ed: Radioactivity: Expect the unexpected - Steve Weatherell

The video explains radioactivity, where unstable nuclei change spontaneously, emitting particles like beta and alpha. Beta particles result from neutron to proton transformation, while alpha particles are helium nuclei. Radioactivity has applications in smoke detectors and medicine, but poses health risks. Gamma radiation, an electromagnetic wave, is used in food preservation and cancer treatment. Ionization from radiation can damage DNA, highlighting the dual nature of radioactivity as both useful and dangerous.

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