Question

What is the electron configuration of the calcium ion?​

Answer 1

[Ar] 4s²
Let me know if you want a step by step!
Hope that helps

Answer 2

Answer: Calcium ion Ca² : 1 s² 2s² 2p ^6 (sorry I don't get 6 similar way as 2) 3s² 3p^6

Also 18 electrons, because Calcium donates two 4s electrons

Explanation: