请提供这些金属的热导率和密度的值：铜、铝、金、银、钨
user
```json
{
  "elements": [
    {
      "name": "铜",
      "thermal_conductivity": "401 W/(m·K)",
      "density": "8.96 g/cm³"
    },
    {
      "name": "铝",
      "thermal_conductivity": "237 W/(m·K)",
      "density": "2.70 g/cm³"
    },
    {
      "name": "金",
      "thermal_conductivity": "318 W/(m·K)",
      "density": "19.32 g/cm³"
    },
    {
      "name": "银",
      "thermal_conductivity": "429 W/(m·K)",
      "density": "10.49 g/cm³"
    },
    {
      "name": "钨",
      "thermal_conductivity": "174 W/(m·K)",
      "density": "19.25 g/cm³"
    }
  ]
}
```
assistant