Radioactivity is caused by the decay of the nucleus which occurs when unstable nuclei lose protons and neutrons. This quiz will look at the time it takes for a specific amount o…

asked Mar 21, 2021 20.3k views

Radioactivity is caused by the decay of the nucleus which occurs when unstable

nuclei lose protons and neutrons. This quiz will look at the time it takes for a specific
amount of radioactive material to decay, which is measured in a unit called half-life.
If you are given the half-life for the decay of a particular radioisotope, then you can
calculate how much of that radioisotope remains after several half-lives:
fraction remaining (FR) = 1/27
where n=number of half-lives
Knowing this, what is the fraction equivalent of 2 half-lives? (Your answer should be
a fraction, no units necessary