Which of the elements listed below would most likely form an ionic bond when bonded to oxygen
A) Cl
B) C
C) O
D) H
E) Ca

Question

Quizplus · Accepted Answer

Calcium (Ca) is a metal and has a low electronegativity, which means it is more likely to give up its two valence electrons and form a positively charged ion (Ca2+) than to gain electrons. Oxygen (O) has a high electronegativity and tends to gain electrons to form a negatively charged ion (O2-). Therefore, when calcium and oxygen combine, they form an ionic bond.

Which of the Elements Listed Below Would Most Likely Form