Question

Discuss the following property with reference to noble gases:

Liquefaction tendency

Answer 1

1. Noble gases are not easily liquefied due to very weak van der Waals’ forces between their atoms.
2. These weak forces mean noble gases have a very low tendency to liquefy.
3. Liquefaction tendency increases down the group from He to Rn.
4. This is because atomic size and van der Waals’ forces increase down the group.

Hence, heavier noble gases liquefy more easily than lighter ones.