What is the core notation for the electron configuration of an aluminum atom?

Question

Quizplus · Accepted Answer

The atomic number of aluminum is 13, indicating that it has 13 electrons. The core notation represents the electron configuration of the inner, fully-filled electron shells, which in aluminum's case is [Ne]. The remaining valence electrons are then added to this core notation. Aluminum is located in group 3A (or 13) of the periodic table, indicating that it has three valence electrons in the 3rd energy level. Therefore, the correct electron configuration for aluminum is [Ne] 3S² 3p¹.

What Is the Core Notation for the Electron Configuration of an Aluminum