Point out the wrong statement
On moving horizontally from left to right across a period in the periodic table

Options

A. Metallic character decreases
B. Electronegativity increases
C. Gram atomic volume first decreases and then increases
D. Size of the atoms increases for normal elements

Explanation

To solve the question of identifying the wrong statement when moving horizontally from left to right across a period in the periodic table, we can analyze each statement provided:

### Step-by-Step Solution:

1. **Understanding the Trend of Metallic Character**:
- As we move from left to right across a period, the metallic character of elements decreases. This is because elements on the left side of the periodic table (like alkali metals) are more metallic, while those on the right (like non-metals) are less metallic.
- **Conclusion**: This statement is **true**.

2. **Analyzing Electronegativity**:
- Electronegativity is the tendency of an atom to attract electrons. As we move from left to right across a period, electronegativity increases. This is due to the increasing nuclear charge which attracts electrons more strongly.
- **Conclusion**: This statement is **true**.

3. **Examining Gram Atomic Volume**:
- The gram atomic volume (or molar volume) of elements tends to decrease initially as we move across a period due to the increase in nuclear charge, which pulls the electrons closer to the nucleus. However, there can be exceptions where it may increase after reaching a certain point.
- **Conclusion**: This statement is **true**.

4. **Assessing Atomic Size**:
- As we move from left to right across a period, the atomic size actually decreases. This is because the increasing positive charge in the nucleus pulls the electrons closer, resulting in a smaller atomic radius.
- **Conclusion**: This statement is **false**.

### Final Answer:
The wrong statement is: "The size of the atom increases."