Give the number of electrons in the species `H_2^+, H_2 and O_2^+`.

Explanation

To find the number of electrons in the species \( H_2^+, H_2, \) and \( O_2^+ \), we can analyze each species step by step.

### Step 1: Determine the number of electrons in \( H_2^+ \)
1. **Identify the atoms**: \( H_2^+ \) consists of 2 hydrogen atoms.
2. **Count the electrons**: Each hydrogen atom has 1 electron. Therefore, 2 hydrogen atoms have:
\[ 2 \times 1 = 2 \text{ electrons} \]
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