Электронная конфигурация атома хрома:

  1. …3s²3p⁶3d⁶
  2. …3s²3p⁶3d⁵4s¹
  3. …3s²3p⁶3d⁴4s²
  4. …3s²3p⁶4s²3p⁴

📝 Detailed explanation

У хрома наблюдается аномальная конфигурация — половинно заполненный d-подуровень.
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