Question

Noble gases have very low boiling point. Why?

Answer 1

The noble gases have weak interatomic force, and consequently have very low melting and boiling points. They are all monatomic gases under standard conditions, including the elements with larger atomic masses than many normally solid elements.

Answer 2

Noble gases being monoatomic have no interatomic forces expect weak dispersion forces and therefore, they are liquified at very low temperature. Hence, they have low boiling point.