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

It would have six electrons in the outermost shell.
It would have six electrons in the innermost shell.
It would have eight electrons in the outermost shell.
It would have eight electrons in the innermost shell.

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Answered by GPT-5 mini AI
It would have eight electrons in the outermost shell.

Explanation: oxygen (atomic number 8) has 2 electrons in the first shell and 6 in the second (valence) shell. By forming bonds (e.g., sharing two electrons in H2O or gaining two to become O2−), oxygen achieves an octet — eight electrons — in its outermost shell.