Provide condensed electron configurations for Se and the most stable ion it forms.

• A. Se: [Ar] 4s² 3d¹⁰ 4p⁴
  Se^2–: [Ar] 4s² 3d¹⁰ 4p²
• B. Se: [Ar] 4s² 3d¹⁰ 4p⁴
  Se^2–: [Ar] 4s² 3d¹⁰ 4p⁶
• C. Se: [Ar] 4s² 3d¹⁰ 4p²
  Se^2–: [Ar] 4s² 3d¹⁰ 4p⁴
• D. Se: [Ar] 3d¹⁰ 4p⁴
  Se^2–: [Ar] 4s² 3d¹⁰ 4p²

Answer: (B)