Which of the following species are paramagnetic?
`H_2 ,H_(2)^(+) and H_(2)^(-)`

Explanation

To determine which of the species \( H_2 \), \( H_2^+ \), and \( H_2^- \) are paramagnetic, we need to analyze the number of unpaired electrons in each species. Paramagnetic species have one or more unpaired electrons, while diamagnetic species have all electrons paired.

### Step-by-step Solution:

1. **Analyze \( H_2 \)**:
- Each hydrogen atom has one electron. Therefore, in \( H_2 \) (which consists of two hydrogen atoms), the total number of electrons is 2.
- The electronic configuration for \( H_2 \) can be written as:
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