# Copper (Cu, #29) Physical & Industrial Element Oracle (`element-oracle-cu-copper`)
- **Status**: 200 OK | **Latency**: 1ms | **Cached**: true
- **Primary Authority**: 100% Platform Deterministic Compute / Reference Engine
- **License & Trust**: IUPAC Public Domain Reference Data (computed_by_platform)
- **Verified At (UTC)**: 2026-10-27T15:19:50.733Z
- **Data Freshness**: cached
## Structured Data
```json
{
  "number": 29,
  "symbol": "Cu",
  "name": "Copper",
  "atomic_mass_u": 63.546,
  "category": "transition metal",
  "phase_stp": "Solid",
  "electronegativity_pauling": 1.9,
  "density_g_cm3": 8.96,
  "melting_point_k": 1357.77,
  "boiling_point_k": 2835,
  "electron_configuration": "[Ar] 3d10 4s1",
  "key_industrial_use": "Electrical grid wiring, AI data center busbars & liquid cooling plates, EV traction motors, PCB traces"
}
```
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