The liquid metal at room temperature________.

Options

A. Mercury
B. Bromine
C. Sodium
D. Gold

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the liquid metal at room temperature.

2. **List the Options**: The options provided are:
- A) Mercury
- B) Bromine
- C) Sodium
- D) Gold

3. **Analyze Each Option**:
- **A) Mercury**: Known to be a metal that is liquid at room temperature.
- **B) Bromine**: This is a non-metal, not a metal.
- **C) Sodium**: This is a solid metal at room temperature.
- **D) Gold**: This is also a solid metal at room temperature.

4. **Determine the Correct Answer**: Among the options, mercury is the only metal that is liquid at room temperature.

5. **Justify the Answer**:
- Mercury (Hg) has a melting point of -38.83 degrees Celsius, which means it is liquid at room temperature (approximately 25 degrees Celsius).
- Its boiling point is 356.70 degrees Celsius, which indicates that it will not vaporize easily at room temperature.

6. **Final Answer**: The liquid metal at room temperature is **Mercury (A)**.

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