Pure substances can be elements or compounds. An element is a form of matter which cannot be broken down by chemical reactions into simpler substances. A compound is a substance composed of two or more different types of elements, chemically combined in a fixed proportion. Properties of a compound are different from its constituent elements, whereas a mixture shows the properties of its constituting elements or compounds
Name the element which becomes liquid at a temperature slightly above the room temperature.

Options

A. Caesium
B. Silicon
C. Iodine
D. Sodium

Explanation

To solve the question of naming the element that 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 typically around 20-25 degrees Celsius (68-77 degrees Fahrenheit). We need to identify elements that transition to liquid just above this temperature.

2. **Identify Elements that are Liquid at Room Temperature**: Some elements are already liquid at room temperature, such as mercury (Hg) and bromine (Br). However, we are looking for those that become liquid slightly above room temperature.

3. **Consider the Properties of Certain Metals**: There are metals that have melting points just above room temperature. Notable examples include:
- **Gallium (Ga)**: Melting point is about 29.76 degrees Celsius.
- **Cesium (Cs)**: Melting point is about 28.5 degrees Celsius.
- **Rubidium (Rb)**: Melting point is around 39 degrees Celsius.

4. **Select the Element**: Among the elements identified, gallium and cesium have melting points just above room temperature. However, gallium is the most commonly referenced element that melts just above room temperature.

5. **Conclude the Answer**: Therefore, the element that becomes liquid at a temperature slightly above room temperature is **Gallium (Ga)**.

### Final Answer:
Gallium (Ga)