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Even if it happens to make it through hundreds of half-lives, it still has a 50% chance of surviving through one more.
In one half-life , the number decreases to half of its original value.The concept of half-life is applicable to other subatomic particles, as will be discussed in Particle Physics.It is also applicable to the decay of excited states in atoms and nuclei. This means they have shorter lifetimes, producing a greater rate of decay. For example, radium and polonium, discovered by the Curies, decay faster than uranium.