Source: wikibot/thorium-232
= Thorium-232
{wiki=Thorium-232}
Thorium-232 is a naturally occurring isotope of thorium, which is a heavy, radioactive element with the atomic number 90. It is one of the most stable isotopes of thorium and has a half-life of about 14.05 billion years, making it significantly long-lived compared to other radioactive isotopes.