Metals have few electrons in their valence shell while non-metals generally have more electrons in their valence shell. Metallic character is closely related to atomic radius and ionisation enthalpy. Metallic character increases from top to bottom in a group and decreases from let to right in a period of periodic table. metallic character is inversely related to electronegativity of element.
Q. The electronegativity of the following elements increase in the order:

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 (carbon, silicon, germanium, tin, lead, nitrogen, phosphorus, arsenic, antimony, bismuth), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Electronegativity**: Electronegativity is defined as the tendency of an atom to attract electrons towards itself in a chemical bond. It generally increases across a period and decreases down a group in the periodic table.

2. **Identify the Groups**: The elements can be categorized into two groups:
- Group 14: Carbon (C), Silicon (Si), Germanium (Ge), Tin (Sn), Lead (Pb)
- Group 15: Nitrogen (N), Phosphorus (P), Arsenic (As), Antimony (Sb), Bismuth (Bi)

3. **Trends in Electronegativity**:
- **Across a Period**: Electronegativity increases from left to right due to increasing nuclear charge and decreasing atomic radius.
- **Down a Group**: Electronegativity decreases due to increasing atomic size and shielding effect.

4. **Comparing Group 14 Elements**:
- **Electronegativity Order**: C > Si > Ge > Sn > Pb
- Carbon has the highest electronegativity in this group, while lead has the lowest.

5. **Comparing Group 15 Elements**:
- **Electronegativity Order**: N > P > As > Sb > Bi
- Nitrogen has the highest electronegativity in this group, while bismuth has the lowest.

6. **Combining the Results**:
- From Group 14: C > Si > Ge > Sn > Pb
- From Group 15: N > P > As > Sb > Bi
- The overall order of electronegativity from highest to lowest is: N > C > P > Si > Ge > As > Sn > Bi > Pb.

7. **Finalizing the Increasing Order**:
- To express the increasing order of electronegativity, we write it from the least electronegative to the most electronegative:
- **Increasing Order**: Pb < Bi < Sb < As < Sn < Ge < Si < P < C < N

### Final Answer:
The electronegativity of the following elements increases in the order: Pb < Bi < Sb < As < Sn < Ge < Si < P < C < N.