Question

Actinides show irregularity in their electronic configuration?

Answer 1

this happens because the energy difference between 5f,6d and 7s subshell of the actinides is very small and hence electrons can be accommodated in any of them.
i think it will help u dear

Answer 2

Hey dear,

● Explaination -
- Actinides occupy 5f period in modern periodic table.
- Energy difference between 5f, 6d & 7s subshells is very small. Hence, various elements in that class show variation in occupation of last electron.
- Most common electronic configuation is 7s2 which can vary if electron jumps to 6d or 5f.
- Therefore, actinides show irregularities in their electronic configuration.

Hope this helps you...