1.1 — practice question

What electronic configuration corresponds to the particle $^{{27}}_{{13}}\mathrm{Al}^{+}$?

• A$1s^2\,2s^2\,2p^6\,3s^1\,3p^1$
• B$1s^2\,2s^2\,2p^6\,3s^2$
• C$1s^2\,2s^2\,2p^6\,3s^2\,3p^2$
• D$1s^2\,2s^2\,2p^6\,3s^2\,3p^6\,3d^7\,4s^1$