Question

what is the oxidation state of oxygen in o₂?
-1/2
+1/2
0
-2

Explanation:

Step1: Recall the rule for oxidation state of elements in free state

In a free element (an element in its uncombined state), the oxidation state of each atom is \(0\).

Step2: Analyze \(O_2\)

\(O_2\) is a di - atomic molecule of oxygen in its free state.

Answer:

\(0\)