The oxygen anion almost always has the charge of -2.

Name: The oxygen anion almost always has the charge of -2.
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The oxygen anion, which is the negatively charged form of oxygen, typically has a charge of -2. This is because oxygen has 6 valence electrons, which it tends to gain two more electrons in order to achieve a stable octet configuration. This results in an overall charge of -2.

The Oxygen Anion Almost Always Has the Charge of -2