Question

The initial concentration of a radioactive substance is N₀ and its half life is 12 hours. What will be its concentration after 36 hours?

Answer 1

Explanation:

The concentration of radioactive elements after its half life always becomes half of the initial

Here half life is 12hr

so after 12 hrs it's concentration will become N/2

after 24 hrs it will be N/4

and after 36hrs concentration will be N/12