The increasing order of electronegativity in the following elements :

Options

A. C, N, Si, P
B. N, Si, C, P
C. Si, P, C, N
D. P, Si, N, C

Answer

To determine the increasing order of electronegativity for the given elements, we will analyze the trends in electronegativity based on their positions in the periodic table.

### Step-by-Step Solution:

1. **Understanding Electronegativity**: Electronegativity is the ability of an atom to attract shared electrons in a chemical bond. It generally increases across a period (from left to right) and decreases down a group (from top to bottom) in the periodic table.

2. **Identify the Elements**: Let's assume the elements in question are Carbon (C), Nitrogen (N), Phosphorus (P), and Silicon (Si).

3. **Position in the Periodic Table**:
- Carbon (C) is in Group 14, Period 2.
- Nitrogen (N) is in Group 15, Period 2.
- Phosphorus (P) is in Group 15, Period 3.
- Silicon (Si) is in Group 14, Period 3.

4. **Comparing Electronegativity**:
- **Carbon vs. Nitrogen**: Nitrogen has a higher electronegativity than Carbon because it is to the right of Carbon in the same period.
- **Phosphorus vs. Silicon**: Phosphorus has a higher electronegativity than Silicon because it is in the same group but in a higher period.
- **Comparing all four**:
- Nitrogen (N) > Carbon (C)
- Phosphorus (P) > Silicon (Si)
- Between Carbon and Silicon, Carbon is more electronegative than Silicon.

5. **Final Order**: Based on the comparisons:
- The order from least to most electronegative is: Silicon (Si) < Phosphorus (P) < Carbon (C) < Nitrogen (N).

Thus, the increasing order of electronegativity for the elements is:
**Silicon < Phosphorus < Carbon < Nitrogen**.