Answer the following :
Name the most abudant form of hydrogen isotope. [Ans. 11H]

Answer

To answer the question about the most abundant form of hydrogen isotope, we can follow these steps:

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

### Step 2: Understand the characteristics of each isotope
- **Protium (¹H)**: This isotope has one proton and no neutrons. It is the most common form of hydrogen.
- **Deuterium (²H)**: This isotope has one proton and one neutron.
- **Tritium (³H)**: This isotope has one proton and two neutrons and is radioactive.

### Step 3: Determine the abundance of each isotope
- Protium is the most abundant isotope, making up about 99.9% of all hydrogen found in nature.
- Deuterium is much less abundant, constituting about 0.0156% of natural hydrogen.
- Tritium is extremely rare and is produced in small amounts in nature.

### Step 4: Conclude the answer
Based on the information, the most abundant form of hydrogen isotope is Protium (¹H).

### Final Answer
The most abundant form of hydrogen isotope is **Protium (¹H)**.

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