Choose the ground state electron configuration for [tex]\mathrm{Zr}^{2+}[/tex].
[tex]
[tex][tex]\begin{aligned}
&{[\mathrm{Kr}] 4 \mathrm{~d}^2} \\
&{[\mathrm{Kr}]} \\
&{[\mathrm{Kr}] 5 \mathrm{~s}^2} \\
&\hline[\mathrm{Kr}] 5 \mathrm{~s}^2 4 \mathrm{~d}^4 \\
&\hline[\mathrm{Kr}] 5 \mathrm{~s}^2 4 \mathrm{~d}^2 \\
&\hline
\end{aligned}[/tex][/tex]
[/tex]