Which of the following is not a member of chalcogens?

Options

A. O
B. S
C. Se
D. Po

Answer

To determine which of the following is not a member of the chalcogens, we first need to understand what chalcogens are.

### Step-by-Step Solution:

1. **Identify the Group of Chalcogens**:
- Chalcogens are elements found in Group 16 of the periodic table. This group includes the following elements: Oxygen (O), Sulfur (S), Selenium (Se), Tellurium (Te), and Polonium (Po).

2. **List the Elements**:
- The elements in Group 16 are:
- Oxygen (O)
- Sulfur (S)
- Selenium (Se)
- Tellurium (Te)
- Polonium (Po)

3. **Check the Options**:
- If the question provides options, we need to check which of these options is not typically classified as a chalcogen.

4. **Consider the Characteristics of Polonium**:
- Although Polonium (Po) is indeed in Group 16, it is a radioactive element. This characteristic often leads to it being excluded from the typical classification of chalcogens in certain contexts.

5. **Conclusion**:
- Based on the information, Polonium (Po) is the element that is not considered a member of the chalcogens due to its radioactive nature.

### Final Answer:
Polonium (Po) is not a member of the chalcogens.

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