Which is a better name for pure `H_(2)`, diprotium or dihydrogen ?

Explanation

To determine which is a better name for pure \( H_2 \), diprotium or dihydrogen, we can analyze the definitions and common usage of these terms.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Dihydrogen**: This term refers to the molecular form of hydrogen, which is \( H_2 \). It indicates that there are two hydrogen atoms in the molecule.
- **Diprotium**: This term specifically refers to the isotope of hydrogen that has no neutrons, which is the most abundant form of hydrogen, also known as protium.

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