All the stable isotopes of boron, carbon, nitrogen, oxygen, and fluorine are shown in the chart in the right hand column (in red), along with their radioactive isotopes with t1/2 > 1 min (in blue).
(a)Write the chemical symbols, including mass and atomic numbers, for all of the stable isotopes.
(b) Which radioactive isotopes are most likely to decay by beta emission?
(c) Some of the isotopes shown are used in positron emission tomography. Which ones would you expect to be most useful for this application?
(d) Which isotope would decay to 12.5% of its original concentration after 1 hour?

Transcribed Image Text:

10 110 min 9 8 5715 yr 64 s 2 min 10 min 71s 6 5 20 min 5 6 8 9 Number of protons