Radioactive isotopes, also known as radioisotopes, are unstable forms of elements that decay over time, releasing radiation in the process.
Consider radioactive isotopes like popcorn kernels heating up in a microwave. Over time, they can't handle their internal pressure anymore and they pop (decay), releasing energy (radiation) into their surroundings.
Half-Life: The time required for half quantity to decay or transform into another form.
Radiation: The emission of energy as electromagnetic waves or as moving subatomic particles.
Decay: The process by which an unstable atomic nucleus loses energy by radiation.
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