The spatial arrangement of the ligands attached to the central metal atom is called

Options

A. Coordination entity
B. Coordination polyhedron
C. Coordination number
D. Chelation

Answer

To solve the question regarding the spatial arrangement of ligands attached to a central metal atom, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the term that describes the spatial arrangement of ligands around a central metal atom in coordination chemistry.

2. **Identifying Key Terms**:
- **Ligands**: Molecules or ions that can donate a pair of electrons to the metal atom.
- **Central Metal Atom**: The metal ion that is at the center of the coordination complex.

3. **Analyzing the Options**:
- **Option 1: Coordination Entity**: This term refers to the entire complex formed by the metal and its ligands, not just the arrangement.
- **Option 2: Coordination Polyhedron**: This term specifically describes the spatial arrangement of the ligands around the central metal atom.
- **Option 3: Coordination Number**: This refers to the number of ligand atoms that are bonded to the central metal atom, not the arrangement.
- **Option 4: Chelation**: This refers to the process of forming a complex by a ligand that can attach to the metal at multiple points, not the arrangement itself.

4. **Conclusion**: The correct term for the spatial arrangement of ligands around a central metal atom is **Coordination Polyhedron**.

### Final Answer:
The spatial arrangement of the ligands attached to the central metal atom is called **Coordination Polyhedron**.

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