Explain with two examples each of the following: coordination entity, ligand, coordination number, coordination polyhedron, homoleptic and heteroleptic

Explanation

### Step-by-Step Solution:

1. **Coordination Entity**:
- A coordination entity consists of a central atom or ion bonded to a fixed number of oppositely charged ions or molecules, known as ligands.
- **Examples**:
- **[Ni(CO)₄]**: In this entity, nickel (Ni) is the central atom, and it is surrounded by four carbon monoxide (CO) ligands.
- **[CoCl₃(NH₃)₃]**: Here, cobalt (Co) is the central atom, bonded to three chloride ions (Cl⁻) and three ammonia (NH₃) ligands.

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