This Element Has A Half-Life Longer Than Universe’s Age
The half-life of Tellurium-128 is 2.2 Septillion years which is around 160 trillion times the age of the Universe! It decays into Xenon-128 by double beta decay. Half-life is the amount of time it takes for one half of a radioactive isotope to decay.
You may wonder which naturally-occurring element has the shortest half-life. That would be Francium, the 87th element, whose longest-lived isotope, francium-223, has a half-life of just 22 minutes.
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