Why a molecule of oxygen is stable but an atom of oxygen is unstable
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But one oxygen atom cant exist on its own, because its unstable. Usually any atom needs 8 electrons in its outer orbit in order to stay stable. But, the Oxygen atom has 6 electrons in its outer orbit. So, it needs two more electrons in order to make it 8.
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Oxygen molecule is 2 oxygen atoms in a covalent bond, whereas an oxygen atom is an atom with 8 electrons (6 valence electrons).
Thus, clearly, any element in a bonded state is always more stable than when in an un-bonded state.
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