Consider the following elements with their period number and valence electrons.
`{:("Elements","Period number","Total valence"e^(-)),(P,2,4),(Q,2,6),(R,3,7),(S,3,3),(T,3,6),(U,3,4):}`
According to the given informations, answer the following questions :
Choose the correct statement :

Options

A. Q has maximum value of electron affinity
B. R has maximum value of electronegativity
C. S has maximum atomic size
D. T and U are same group elements

Explanation

To solve the question, we need to analyze the given elements based on their period numbers and valence electrons and then evaluate the provided statements.

### Step-by-Step Solution:

1. **Identify the Elements**:
- From the data provided:
- P: Period 2, 4 valence electrons → Carbon (C)
- Q: Period 2, 6 valence electrons → Oxygen (O)
- R: Period 3, 7 valence electrons → Chlorine (Cl)
- S: Period 3, 3 valence electrons → Aluminum (Al)
- T: Period 3, 6 valence electrons → Sulfur (S)
- U: Period 3, 4 valence electrons → Silicon (Si)

2. **Evaluate Each Statement**:
- **Statement 1**: Q has the maximum value of electron affinity.
- **Analysis**: Oxygen (Q) does have a high electron affinity, but Chlorine (R) has an even higher electron affinity. Thus, this statement is **false**.

- **Statement 2**: R has the maximum value of electronegativity.
- **Analysis**: Chlorine (R) is indeed electronegative, but Fluorine (not listed) is more electronegative than Chlorine. Therefore, this statement is **false**.

- **Statement 3**: S has the maximum size.
- **Analysis**: Among the elements listed, Aluminum (S) is larger than Oxygen (Q), Chlorine (R), and Sulfur (T), as size increases down a group and decreases across a period. Thus, this statement is **true**.

- **Statement 4**: T and U are same group elements.
- **Analysis**: Sulfur (T) belongs to Group 16, while Silicon (U) belongs to Group 14. Hence, this statement is **false**.

3. **Conclusion**:
- The only correct statement is **Statement 3**: S has the maximum size.

### Final Answer:
The correct statement is **S has the maximum size**.

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