Considering the elements `B, C, N` and `Si`, the correct order of their non-metallic character is ?

Options

A. `B gt C gt Si gt N gt F`
B. `Si gt C gt B gt N gt F`
C. `F gt N gt C gt B gt Si`
D. `F gt N gt C gt Si gt B`

Explanation

To determine the correct order of non-metallic character for the elements Boron (B), Carbon (C), Nitrogen (N), and Silicon (Si), we can follow these steps:

### Step 1: Understand Non-Metallic Character
Non-metallic character refers to the tendency of an element to gain electrons and form negative ions. Generally, non-metallic character increases from left to right across a period in the periodic table and decreases down a group.

### Step 2: Identify the Position of Elements
- Boron (B) is in Group 13 (IIIA) and Period 2.
- Carbon (C) is in Group 14 (IVA) and Period 2.
- Nitrogen (N) is in Group 15 (VA) and Period 2.
- Silicon (Si) is in Group 14 (IVA) and Period 3.

### Step 3: Compare Non-Metallic Character
- **Across the Period:** As we move from left to right across a period, the non-metallic character increases. Therefore, in Period 2, we have:
- N > C > B
- **Down the Group:** As we move down a group, the non-metallic character decreases. Therefore, comparing Carbon and Silicon (both in Group 14):
- C > Si

### Step 4: Combine the Information
Now we can combine the information:
- From Period 2: N > C > B
- From Group comparison: C > Si

### Step 5: Final Order
Now we can establish the final order of non-metallic character for the elements:
- Nitrogen (N) has the highest non-metallic character.
- Carbon (C) is next.
- Silicon (Si) follows.
- Boron (B) has the least non-metallic character.

Thus, the correct order of non-metallic character is:
**N > C > Si > B**

### Conclusion
The final answer is that the correct order of non-metallic character for the elements B, C, N, and Si is:
**N > C > Si > B**