Illah?
100%
3. There were originally 32 atoms of a radioactive isotope with a half life of 1,000 years in a fossil. There are 8
undecayed atoms of the isotope remaining. How many years have gone by?
How many half lives has the isotope
been through?
How many years have gone by?
What percentage and fraction of the
original isotope is remaining?
100% )