Worksheet: The Graph of Nuclear Stability
In this worksheet, we will practice using a plot of proton and neutron numbers for stable nuclei to predict the decay patterns of radioisotopes.
The figure below illustrates the numbers of neutrons, , in known isotopes as a function of their atomic numbers, . Stable (nonradioactive) isotopes lie on a narrow band of stability, indicated in blue.
Which of the following isotopes does not lie within the band of stability?
Which of the following isotopes is likely to decay by electron capture?
Which of the following isotopes is likely to undergo decay?