Question

Discuss the following property with reference to noble gases:

Ionisation energy

Answer 1

1. Noble gases have very high ionisation energies.
2. Their atoms have full, stable electronic configurations (ns²np⁶).
3. High nuclear charge tightly holds valence electrons.
4. Removing an electron requires large energy input.
5. Ionisation energy decreases slightly down the group due to increased atomic size.
6. The high ionisation energy makes noble gases very unreactive and stable.