What is the slowest decaying radioactive element?

5 Answers

Relevance
  • 1 decade ago
    Favorite Answer

    You will have to look at the half-life of every isotope for every element. I happen to know that U-238 has a half-life of 4.5 billion years. That's pretty long, so the decay rate is pretty slow. 4.5 billion years is the age of the Earth.

    • Login to reply the answers
  • HPV
    Lv 7
    1 decade ago

    I don't know if it's the slowest, but U-238 (which makes up over 99% of all uranium in the soil) has a half-life of 4.5 billion years!

    • Login to reply the answers
  • 1 decade ago

    50V is a radioactive isotope of Vanadium (V) with a half life with a half-life of 1.5×10^17 years

    • Login to reply the answers
  • 1 decade ago

    i can think of carbon - 14. i think its got a half life of 6000yrs

    edit : the guy below says thers an even longer one! so ignore me!! :)

    Source(s): my head. if u need clarification. search the internet, but im really sure!!
    • Login to reply the answers
  • How do you think about the answers? You can sign in to vote the answer.
  • 1 decade ago

    My mom's meatloaf.

    • Login to reply the answers
Still have questions? Get your answers by asking now.