The noble gas with the highest boiling point is :

Options

A. Xe
B. He
C. Ne
D. Kr

Answer

To determine which noble gas has the highest boiling point, we can follow these steps:

### Step 1: List the noble gases and their atomic weights
We start by identifying the noble gases provided in the question and their respective atomic weights:
- **Xenon (Xe)**: 131.29 g/mol
- **Helium (He)**: 4.00 g/mol
- **Neon (Ne)**: 20.17 g/mol
- **Krypton (Kr)**: 83.79 g/mol

### Step 2: Understand the relationship between atomic weight and boiling point
It is known that for noble gases, as the atomic weight increases, the boiling point also tends to increase. This is due to the fact that larger atoms have more electrons, which leads to stronger Van der Waals forces (intermolecular forces) that require more energy (in the form of heat) to overcome.

### Step 3: Compare the atomic weights
Now, we compare the atomic weights of the noble gases:
- **He**: 4.00 g/mol
- **Ne**: 20.17 g/mol
- **Kr**: 83.79 g/mol
- **Xe**: 131.29 g/mol

From this comparison, we can see that Xenon has the highest atomic weight.

### Step 4: Conclude the boiling point
Since boiling point is directly related to atomic weight for noble gases, we conclude that:
- **Xenon (Xe)**, having the highest atomic weight, will also have the highest boiling point among the given noble gases.

### Final Answer
The noble gas with the highest boiling point is **Xenon (Xe)**.

---