## General Chemistry 10th Edition

We know that total electrons $2\times 2-1=3$ The electronic configuration is $(\sigma1s)^2(\sigma 1s^\star)^1$ Bond order $\frac{1}{2}(n_b-n_a)$ We plug in the known values to obtain: $\frac{1}{2}(2-1)=\frac{1}{2}$ Thus, the $He^{+2}$ ion is considered to be stable.