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Karnataka Board PUCPUC Science 2nd PUC Class 12

F-block Elements - The Actinoids

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Estimated time: 2 minutes
Maharashtra State Board: Class 12

Key Points: The Actinoids

  • Elements in which the last electron enters the 5f-orbital (Th to Lr)
  • Second inner transition series (Z = 90 to 103)
  • General electronic configuration: \[5f^{1-14},6d^{0-1},7s^{2}\]
  • Show irregular electronic configurations
  • Stability associated with f⁰, f⁷, f¹⁴ configurations
  • Examples of exceptions:
    • Am: [Rn] 5f⁷ 7s²
    • Cm: [Rn] 5f⁷ 6d¹ 7s²

Shaalaa.com | D and F Block Elements part 32 (Actinoids)

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D and F Block Elements part 32 (Actinoids) [00:12:09]
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