# What is the electron configuration for As_3?

Oct 12, 2016

Do you mean $\text{arsenide ion, } A {s}^{3 -}$?

#### Explanation:

Reduction of the Group 15 elements can lead to to ${N}^{3 -} ,$ ${P}^{3 -}$, and $A {s}^{3 -}$ ions. In this configuration the atom has the same electronic configuration as the nearest Noble Gas.

For $\text{arsenic}$, this is $\text{krypton, } Z = 36$.