Which one is used for dating archaeological specimens like bones, shells and wood?

Options

A. `^(3)H`
B. `^(14)C`
C. `^(121)I`
D. `^(32)P`

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the method used to date archaeological specimens such as bones, shells, and wood.

2. **Identifying Dating Techniques**: There are various dating techniques available, but we need to focus on those specifically used for organic materials.

3. **Exploring Radiometric Dating**: Radiometric dating is a common method for determining the age of materials. Among these, radiocarbon dating is particularly significant for dating organic materials.

4. **Defining Radiocarbon Dating**: Radiocarbon dating, also known as carbon-14 dating, is a technique that measures the amount of carbon-14 present in organic materials. This method is effective for dating specimens like bones, wood, and shells.

5. **Analyzing the Options**:
- **Option 1: 3H (Tritium)** - Used for quantitative tests of water, not suitable for dating archaeological specimens.
- **Option 2: 14C (Carbon-14)** - This is the correct option as it is specifically used for dating organic materials.
- **Option 3: 121I (Iodine-121)** - Primarily used in medicine, not for dating.
- **Option 4: 32P (Phosphorus-32)** - Used in laboratory methods for labeling DNA and proteins, not for dating.

6. **Conclusion**: Based on the analysis, the correct answer is **14C (Carbon-14)**, as it is the method used for dating archaeological specimens like bones, shells, and wood.

**Final Answer**: The method used for dating archaeological specimens like bones, shells, and wood is **14C (Carbon-14) dating**.

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