Atoms in hydrogen have abundance of :

Options

A. `._(1)H^(1)` atoms
B. `._(1)D^(2)` atoms
C. `._(1)T^(3)` atoms
D. All three are in equal proportions

Answer

To solve the question regarding the abundance of hydrogen isotopes, we will follow these steps:

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

### Step 2: Understand the Concept of Abundance
Abundance refers to the relative amount of each isotope present in a natural sample.

### Step 3: Research the Abundance of Each Isotope
- Protium (¹H) is the most abundant isotope of hydrogen, making up about 99.8% of all hydrogen found on Earth.
- Deuterium (²H) is present in much smaller amounts, approximately 0.016%.
- Tritium (³H) is the least abundant, with an abundance of about 0.0001% to 0.015% (often cited as 10 to 15 parts per million).

### Step 4: Compare the Abundance Values
From the abundance values:
- Protium: 99.8%
- Deuterium: 0.016%
- Tritium: 0.0001% to 0.015%

### Step 5: Determine the Correct Answer
Since the question asks about the abundance of hydrogen atoms, and we see that Protium has the highest abundance, the answer is:
- Protium (H-1) is the most abundant isotope of hydrogen.

### Final Answer
The atoms in hydrogen have an abundance of Protium (H-1).

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