Conjugate base of `H_(2)` is

Options

A. `H_(3)^(+)`
B. `H_(3)^(-)`
C. `H^(+)`
D. `H^(-)`

Explanation

To find the conjugate base of \( H_2 \) (hydrogen gas), we will follow the concept of conjugate acid-base pairs. Here’s a step-by-step solution:

### Step 1: Identify the Acid
In this case, \( H_2 \) acts as an acid. According to the Brønsted-Lowry theory, an acid is a substance that donates a proton (\( H^+ \)).

### Step 2: Remove a Proton
To find the conjugate base, we need to remove one proton (\( H^+ \)) from the acid.

\[ H_2 \rightarrow H_2 - H^+ = H^- \]

### Step 3: Determine the Conjugate Base
After removing one proton from \( H_2 \), we are left with \( H^- \). This \( H^- \) is the conjugate base of \( H_2 \).

### Conclusion
Thus, the conjugate base of \( H_2 \) is \( H^- \).

### Final Answer
The conjugate base of \( H_2 \) is \( H^- \).

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