Name the least ductile metal.

Explanation

**Step-by-Step Solution:**

1. **Understanding Ductility:**
- Ductility is a property of metals that allows them to be stretched into thin wires without breaking. This property is important in various applications where metals need to be formed into wire shapes.

2. **Identifying the Least Ductile Metals:**
- To determine the least ductile metal, we need to consider metals that do not stretch easily into wires.

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