I was looking for some element's half-life, on the following website:


For 214,88-Ra, the half-life is shown to be: 2.46 s 3

I am unsure what the "3" stands for, is it "$\cdot 10^{-3}$"?

Thank you for your help and time guys.


1 Answer 1


The half life of Radium 214 is 2.46[s]. You can check half times at the following wikipedia article.

I am not sure what the 3 stands for, but I suspect that this is some sort of annotation/footnote that was not properly inserted in the webpage.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.