Why are metals good conductors of electricity.

Explanation

### Step-by-Step Solution:

1. **Understanding Conductors**:
- Conductors are materials that allow electricity to flow through them easily. They do this by providing free-moving charged particles.

2. **Role of Electrons in Metals**:
- In metals, the outermost electrons (valence electrons) are not tightly bound to the nucleus. This means they can move freely within the metal structure.

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