How would an electron shell model of an oxygen atom (O) appear after the atom has formed chemical bonds?

A neutral oxygen atom has 6 electrons in its outer shell and needs 2 more to complete that shell. When it forms chemical bonds, it gains or shares electrons so that it has an octet: 8 electrons in the outermost shell. The innermost shell remains filled with 2 electrons, so the correct choice is eight electrons in the outermost shell.

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