Help with nuclear explosion released isotopes

[dovis]

After a nuclear explosion in the environment remains a lot of half-life of a radioactive isotope . Which of them pose the greatest danger to people , find themselves in the same place after a certain time ? why?

 

[berkeman]

After a nuclear explosion in the environment remains a lot of half-life of a radioactive isotope . Which of them pose the greatest danger to people , find themselves in the same place after a certain time ? why?

Welcome to the PF.

Is this question for schoolwork? What is the context of the question? And there are different kinds of nuclear explosions -- which one did you have in mind?

 

[nikkkom]

start with

https://en.wikipedia.org/wiki/Nuclear_fallout
https://en.wikipedia.org/wiki/Nuclear_fission_product
https://en.wikipedia.org/wiki/Fission_product_yield[/PLAIN]