Name the crystal structure of copper metal.

Explanation

**Step-by-Step Solution:**

1. **Identify the Metal**: The question asks for the crystal structure of copper metal.

2. **Determine the Crystal Structure Type**: Copper is known to have a specific arrangement of its atoms in the solid state. The common crystal structure types include body-centered cubic (BCC), face-centered cubic (FCC), and hexagonal close-packed (HCP).

3. **Confirm the Crystal Structure of Copper**: Copper specifically crystallizes in a face-centered cubic (FCC) arrangement. This means that the atoms are located at each corner of the cube and at the centers of each face of the cube.

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