The number of coordinating or ligating groups present in a ligand is called its ……. . '

Explanation

To answer the question, "The number of coordinating or ligating groups present in a ligand is called its …….," we need to understand the concept of ligands and their properties in coordination chemistry.

### Step-by-Step Solution:

1. **Understanding Ligands**:
- Ligands are molecules or ions that can donate a pair of electrons to a metal atom or ion to form a coordination complex.

2. **Coordinating Groups**:
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