Identify the ground-state electron configuration for Se²^-. A)[Ar]4s²3d¹⁰4p⁴ B)[Ar]4s²3d¹⁰4p² C)[Ar]4s²4p⁶ D)[Ar]4s²3d¹⁰4p⁶ E)[Ar]4s²3d⁸4p⁶

Question

Quizplus · Accepted Answer

- The electron configuration starts with [Ar], indicating that all the electrons up to argon (atomic number 18) have already been accounted for. 
- The notation "S1U1P12" for sulfur indicates that there is one electron in the 3s orbital (represented by S), one electron in the 3p orbital with ml=-1 (represented by U), and two electrons in the 3p orbital with ml=0 (represented by P1). 
- For selenium, there are 6 electrons beyond argon, represented by the notation "S1S1P0S1U1P1-". The minus sign at the end indicates that there is one extra electron. 
- Putting this all together, the ground-state electron configuration is: [Ar] 4sS1U1P12S1S1P03dS1U1P110S1S1P04pS1U1P16S1S1P0.

Identify the Ground-State Electron Configuration for Se2-

Identify the Ground-State Electron Configuration for Se²^-