Which element has the following electron configuration: [Ar] 4S₂ 3d5?

Question

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The electron configuration [Ar] 4S₂ 3d5 indicates that the element has 25 electrons in total. The [Ar] indicates that the first 18 electrons fill up the first three energy levels and that the remaining 7 electrons are in the fourth energy level. The 4S² configuration tells us that the element has 2 electrons in the 4S sublevel, and the 3d5 configuration tells us that the element has 5 electrons in the 3d sublevel. The only element that fits this description is manganese (Mn), which has an atomic number of 25.

Which Element Has the Following Electron Configuration: [Ar] 4S₂ 3d5