What happens to the conductivity of metals with increase in temperautre ?

Explanation

### Step-by-Step Solution:

1. **Understanding Conductivity in Metals**:
- Metals are good conductors of electricity due to the presence of free electrons in their structure. These free electrons allow electric current to flow easily through the metal.

2. **Effect of Temperature on Metal Ions**:
- When the temperature of a metal increases, the metal ions within the lattice structure begin to vibrate more vigorously. This is because higher temperatures provide more energy to the ions.

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