Question

An oxygen atom has six electrons in its outermost energy level.

Explain why TWO oxygen atoms must share four electrons when they form a covalent bond?

Please answer in complete sentences and thoroughly. 5-7

Answer 1

There must be two oxygen atoms to form covalent bond as when each oxygen atom contribute 4 electrons to the another, the atoms will become stable as they both have 8 electrons on the outermost shell. Refer to the dots and cross diagram i drew.