Which of the following non-metals is a liquid at room temperature?

Options

A. Hg
B. `Cl_(2)`
C. `Br_(2)`
D. `I_(2)`

Explanation

To determine which non-metal is a liquid at room temperature, we can analyze the options provided:

1. **Identify the Options:**
- Option A: Mercury (Hg)
- Option B: Chlorine (Cl)
- Option C: Bromine (Br)
- Option D: Iodine (I)

2. **Classify Each Option:**
- Mercury is a metal, not a non-metal.
- Chlorine is a non-metal and is a gas at room temperature.
- Bromine is a non-metal and is a liquid at room temperature.
- Iodine is a non-metal and is a solid at room temperature.

3. **Determine the State at Room Temperature:**
- Mercury (metal) - liquid
- Chlorine (non-metal) - gas
- Bromine (non-metal) - liquid
- Iodine (non-metal) - solid

4. **Conclusion:**
- Among the non-metals listed, only Bromine (Br) is a liquid at room temperature.

Thus, the answer to the question is **Option C: Bromine**.