The isotopes of hydrogen are :

Explanation

To answer the question about the isotopes of hydrogen, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the concept of isotopes**: Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons in their nuclei.

2. **Identify the element**: In this case, we are focusing on hydrogen (H), which has an atomic number of 1. This means that all isotopes of hydrogen will have one proton.

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