Which of the following statements is incorrect? 

Options

A. With the decrease in electronegativity in a group the metallic character increases.
B. Smaller ionization energy value indicates that electropositive character is more.
C. Electronegativity does not depend upon `Z_("effective")`
D. Successive ionization energies always increase for an element.

Answer

To determine which statement is incorrect, we will analyze each statement one by one based on the principles of periodic properties.

### Step-by-Step Solution:

1. **Statement 1: With the decrease in electronegativity, metallic character increases.**
- **Analysis**: Electronegativity is the ability of an atom to attract electrons. Metallic character refers to the tendency of an atom to lose electrons. As electronegativity decreases, the ability to attract electrons weakens, which means the tendency to lose electrons (metallic character) increases.
- **Conclusion**: This statement is **correct**.

2. **Statement 2: Smaller ionization energy values indicate the electropositive character is more.**
- **Analysis**: Ionization energy is the energy required to remove an electron from an atom. A lower ionization energy means that the outermost electron is less tightly bound and can be removed more easily, indicating a stronger electropositive character (the ability to donate electrons).
- **Conclusion**: This statement is **correct**.

3. **Statement 3: Electronegativity does not depend on Z effective.**
- **Analysis**: The effective nuclear charge (Z effective) is the net positive charge experienced by an electron in a multi-electron atom. A higher Z effective means that the nucleus can attract electrons more strongly, which directly affects electronegativity. Therefore, electronegativity does depend on Z effective.
- **Conclusion**: This statement is **incorrect**.

4. **Statement 4: Successive ionization energies always increase for an element.**
- **Analysis**: As electrons are removed from an atom, the remaining electrons experience a greater effective nuclear charge due to fewer electron-electron repulsions. This leads to an increase in ionization energy as more electrons are removed.
- **Conclusion**: This statement is **correct**.

### Final Conclusion:
The incorrect statement is **Statement 3**: "Electronegativity does not depend on Z effective."