Question

What is the electron configuration for `As_3`?

Answer 1

Do you mean `"arsenide ion, " As^(3-)`?

Explanation:

Reduction of the Group 15 elements can lead to to `N^(3-),` `P^(3-)`, and `As^(3-)` ions. In this configuration the atom has the same electronic configuration as the nearest Noble Gas.

For `"arsenic"`, this is `"krypton, "Z=36`.