The element which becomes liquid at a temperature slightly above the room temperature is

Options

A. caesium
B. silicon
C. iodine
D. sodium

Answer

To solve the question of which element becomes liquid at a temperature slightly above room temperature, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Room Temperature**:
- Room temperature is generally considered to be around 25 degrees Celsius.

2. **Identify the Melting Points of Elements**:
- We need to find the melting points of various elements to see which one is just above 25 degrees Celsius.
- The melting points of the elements in question are:
- **Cesium (Cs)**: Approximately 28°C
- **Silicon (Si)**: Approximately 1414°C
- **Iodine (I)**: Approximately 114°C
- **Sodium (Na)**: Approximately 98°C

3. **Compare Melting Points with Room Temperature**:
- We are looking for an element whose melting point is slightly above 25°C.
- Among the elements listed:
- Cesium melts at 28°C, which is just above room temperature.
- Silicon, Iodine, and Sodium have much higher melting points and will not melt at temperatures close to room temperature.

4. **Conclusion**:
- The only element that becomes liquid at a temperature slightly above room temperature (25°C) is **Cesium (Cs)**, as its melting point is 28°C.

### Final Answer:
The element which becomes liquid at a temperature slightly above room temperature is **Cesium (Cs)**.

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