What is the ground-state electronic configuration of a sodium cation (sodium: atomic number 11)? A) 1s²2s²2p⁶3s¹ B) 1s²2s²2p⁵3s¹ C) 1s²2s²2p⁶ D) 1s²2s²2p⁶3s²

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The ground-state electronic configuration of a sodium cation (Na+) is obtained by removing one electron from the neutral sodium atom. Neutral sodium (Na) has the electronic configuration 1s^2 2s^2 2p^6 3s^1. Removing one electron (the 3s electron) results in 1s^2 2s^2 2p^6, which matches choice C.

What Is the Ground-State Electronic Configuration of a Sodium Cation