y does the boilin point of the noble gases increase as we move down the group of noble gases?

Answer 1

Larger atoms yield to a stronger intermolecular van der Waals force, which must be overcome in order to convert something from a liquid to a gas. A stronger force will require more energy to overcome, which means a higher temperature.

Answer 2

As the molecular weight increases, the boing point increases. It is harder to get the molecules to fly free in the gaseous state as they get larger.

Answer 3

because of their density