# What is the electron configuration of Ni^(+3)?

Mar 12, 2018

I guess it should be $\left[A r\right] 3 {d}^{7}$.

#### Explanation:

Well, we first need to find a neutral nickel atom's electron configuration.

It is $\left[A r\right] 3 {d}^{8} \setminus 4 {s}^{2}$.

Now, we need to find the electron configuration for a nickel(III) cation.

That means, it has lost three electrons from its electron configuration, and therefore loses both of its $4 s$ electrons, and one $3 d$ electron, thus leaving a configuration of

$\left[A r\right] 3 {d}^{7}$.

I hope this helps!