# Why does argon boil at a higher temperature than neon does?

Jun 27, 2016

#### Answer:

Because $A r$ has a larger, more diffuse electron cloud than does $N e$.

#### Explanation:

For $N e$, $Z = 10$, for $A r$, $Z = 18$. Thus argon has 8 extra electrons in a more diffuse electron cloud. The electron cloud of argon is thus more larger and more polarizable, and more able to express intermolecular dispersion forces. The result? The $\text{boiling point}$ of $A r = 87.2 K$; of $N e = 24.5 K$.