Which isotope of hydrogen contains equal number of protons and neutrons?

Explanation

To determine which isotope of hydrogen contains an equal number of protons and neutrons, we can follow these steps:

### Step 1: Identify the isotopes of hydrogen
Hydrogen has three isotopes:
1. Protium (¹H₁)
2. Deuterium (²H₁ or D)
3. Tritium (³H₁ or T)

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