How many unpaired of electron are present in ` O_2^-`

Explanation

To determine the number of unpaired electrons in the \( O_2^- \) ion, we will use the molecular orbital theory. Here’s a step-by-step solution:

### Step 1: Determine the total number of electrons in \( O_2^- \)
- Oxygen (O) has an atomic number of 8, meaning each oxygen atom has 8 electrons.
- Therefore, \( O_2 \) has \( 8 + 8 = 16 \) electrons.
- The \( O_2^- \) ion has one extra electron due to the negative charge, bringing the total to \( 16 + 1 = 17 \) electrons.

### Step 2: Write the electron configuration for \( O_2^- \)
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