How many electrons are shared between the two oxygen atoms in a molecule of oxygen (O2)?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 4
An oxygen atom has 6 electrons in its outer shell and needs 2 more to complete its octet. Each oxygen atom shares 2 electrons with the other, forming a double bond (O=O), so 2 + 2 = 4 electrons are shared.