For which of the following pairs of elements would "electron transfer" between atoms most likely occur?

Question

Quizplus · Accepted Answer

Electron transfer is most likely between elements that have a significant difference in electronegativity, typically between metals and nonmetals. Calcium (Ca) is a metal, and oxygen (O) is a nonmetal, making them likely to engage in electron transfer, with calcium losing electrons (oxidation) and oxygen gaining electrons (reduction).

For Which of the Following Pairs of Elements Would "Electron