If the maximum number of electrons in the M (3rd) shell is 18 electrons, i e the 3rd shell - Science - Electronic Configuration and the Periodic Table

Question

If the maximum number of electrons in the M (3rd) shell is 18
electrons, i e the 3rd shell should accommodate a maximum 18
electrons, then why is the electronic configuration of Calcium
2,8,8,2 and not 2,8,10?

Akanksha C. · Accepted Answer

Kindly refer to the similar link given below:

https://www meritnation
com/ask-answer/question/can-u-tell-me-the-electronic-configuration-of-potassium-as-a/periodic-classification-of-elements/3430960

If the maximum number of electrons in the M (3rd) shell is 18 electrons, i.e. the 3rd shell should accommodate a maximum 18 electrons, then why is the electronic configuration of Calcium 2,8,8,2 and not 2,8,10?