Q

# (i) Write the electronic configurations of the following ion: (c) O 2 -

2.23    (i) Write the electronic configurations of the following ion:

(c)    $\textup{O}^{2-}$

The electronic configuration of $O$ having $Z=8$ is : $1s^22s^22p^4$
Now, the electronic configuration of $\textup{O}^{2-}$ will be $1s^22s^22p^6$.