For which of the following isotopes would it be unlikely to observe electron capture?

Question

Quizplus · Accepted Answer

Electron capture is a process more commonly observed in proton-rich isotopes, where a proton in the nucleus captures an orbiting electron and converts into a neutron, emitting a neutrino. Aluminum (Al), with a stable isotope configuration, is less likely to undergo electron capture compared to the other isotopes listed, which are either heavier or have more protons relative to neutrons, making them more prone to this process to achieve stability.

For Which of the Following Isotopes Would It Be Unlikely