A sample of iodine-131 has an activity of 200 mCi. If the half-life of iodine-131 is 8.0 days, what activity is observed after 16 days

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

Which is an example of a highly unstable isotope that is often used in fission reactions?

Why can water dissolve many ionic compounds