Which element is the end product of each natural radioactive series

Options

A. Sn
B. Bi
C. Pb
D. C

Explanation

To determine the end product of each natural radioactive series, we can follow these steps:

### Step 1: Understand Natural Radioactive Series
Natural radioactive series refer to the sequences of decay processes that certain unstable isotopes undergo until they reach a stable state. Each series begins with a parent isotope and ends with a stable daughter isotope.

### Step 2: Identify the Common End Product
In the context of natural radioactive decay, the common stable end product for most series is lead (Pb). This is because lead has an atomic number of 82, which is the point where many radioactive elements tend to stabilize.

### Step 3: List the Natural Radioactive Series
There are three main natural radioactive series:
1. **Uranium-238 series**: Begins with Uranium-238 and ends with Lead-206.
2. **Uranium-235 series**: Begins with Uranium-235 and ends with Lead-207.
3. **Thorium-232 series**: Begins with Thorium-232 and ends with Lead-208.

### Step 4: Conclusion
Thus, the end product of each natural radioactive series is lead (Pb), specifically different isotopes of lead depending on the series.

### Final Answer
The end product of each natural radioactive series is lead (Pb).

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