Question

whats the electron configeration for calcium the ion?

Answer 1

what type ion 2+ or 1+?

Answer 2

Ground state electron configuration: [Ar].4s2

Answer 3

\[1s^2 2s^2 2p^6 3s^2 3p^6 4s^2\]
or
\[[Ar]4s^2\]
for short. Since everything before 4s2 as I wrote before is simply the electron configuration for Ar.