I'm given the initial activity to be 3000Bq with a half life of 6 hours. It's asking me for the number of unstable nuclei.
It also asked me for decay constant which I got to be 3.2x10^-5 by using ln2/(6x3600) which was correct.
I'm on IsaacPhysics so when I type the answer in and I'm told if my answer is correct or not. Can anyone help with finding the number of unstable nuclei?