Which of the following transformations is not an electron capture?

Question

Quizplus · Accepted Answer

Electron capture involves a parent nucleus absorbing an inner atomic electron, which causes a proton in the nucleus to convert into a neutron, thus changing the element. In options A, B, and D, this process is accurately described. However, option C (231Th → 231Pa) represents a beta decay, where a neutron in the nucleus converts into a proton, emitting an electron (beta particle), rather than capturing an electron.

Which of the Following Transformations Is Not an Electron Capture