Find the incorrect statement regarding the conditions for the combination of atomic orbitals.

Options

A. The combining atomic orbitals must have the same or nearly the same energy
B. The combining atomic orbitals must have the same symmetry about the molecular axis
C. The combining atomic orbitals must have different symmetry about the molecular axis
D. The combining atomic orbitals must overlap to maximum extent

Answer

To find the incorrect statement regarding the conditions for the combination of atomic orbitals, we will analyze each statement provided in the question step by step.

### Step 1: Analyze the First Statement
**Statement:** The combining atomic orbitals must have the same or nearly the same energy.

**Explanation:** This statement is true. For effective overlap and combination of atomic orbitals to form molecular orbitals, the orbitals must have similar energy levels. For example, a 1s orbital from one atom can combine with another 1s orbital from a different atom, but it cannot effectively combine with a 2p orbital due to the significant energy difference.

**Hint:** Check if the energy levels of the orbitals involved are similar for effective combination.

### Step 2: Analyze the Second Statement
**Statement:** The combining atomic orbitals must have symmetry about the molecular axis.

**Explanation:** This statement is also true. For atomic orbitals to combine effectively, they need to exhibit symmetry with respect to the molecular axis. This symmetry allows for proper overlap, which is essential for the formation of molecular orbitals.

**Hint:** Consider the geometric arrangement of the orbitals and how they align with respect to the molecular axis.

### Step 3: Analyze the Third Statement
**Statement:** The combining atomic orbitals must develop overlap to the maximum extent.

**Explanation:** This statement is true as well. The greater the overlap between the atomic orbitals, the higher the electron density in the region between the nuclei, which leads to stronger bonding. Therefore, maximizing overlap is crucial for effective bonding.

**Hint:** Think about how overlap influences the strength of the bond formed between atoms.

### Step 4: Analyze the Fourth Statement
**Statement:** The combining atomic orbitals must have different symmetry about the molecular axis.

**Explanation:** This statement is false. For atomic orbitals to combine and form molecular orbitals, they must have the same or compatible symmetry about the molecular axis. Different symmetries would hinder effective overlap and bonding.

**Hint:** Reflect on how symmetry affects the ability of orbitals to combine and form stable bonds.

### Conclusion
The incorrect statement regarding the conditions for the combination of atomic orbitals is: "The combining atomic orbitals must have different symmetry about the molecular axis." This statement contradicts the requirement for effective overlap and bonding.