Name one liquid metal and one liquid non-metal.

Explanation

**Step-by-Step Solution:**

1. **Understanding Metals and Non-Metals:**
- Metals are typically solid at room temperature and are good conductors of heat and electricity. They are also lustrous and sonorous.
- Non-metals, on the other hand, can be solid or gaseous and are generally poor conductors of heat and electricity. They are non-lustrous and non-sonorous.

2. **Identifying Liquid Metals:**
- While most metals are solid, there is an exception. The only metal that is liquid at room temperature is mercury, which is represented by the chemical symbol Hg. Mercury is commonly used in thermometers.
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