The electron configuration of vanadium in its 3 oxidation state is Ar 3d2.
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The electron configuration of a vanadium atom in its ground state in the V3 oxidation state is Ar 3d2.
The electron configuration of a chromium atom in its 2 oxidation state is Ar 3d4 4s0.
The oxidation state of the potassium ion (K) in K2O is +1, as it typically loses one electron to achieve a stable electron configuration. The oxidation state of the oxygen ion (O) in K2O is -2, as it tends to gain two electrons to reach a stable electron configuration.
The oxidation state of sodium is +1, as it typically loses one electron to achieve a stable electron configuration. Chlorine's oxidation state is -1, as it usually gains one electron to satisfy its octet rule.
Potassium typically has an oxidation state of +1 in ionic compounds due to its tendency to lose one electron to achieve a stable electron configuration.