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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper I covers inorganic chemistry.

UPSC Combined Geo-Scientist, Mains · 2018 · Mains Paper I

Q4(a). Ground terms by Hund's rules

Question

Calculate ground state terms for the following electronic configurations: (i) d³ (ii) d⁴ (iii) d⁸ (iv) f³ and (v) f⁷.

Answer in brief

The ground levels are ⁴F_(3/2), ⁵D₀, ³F₄, ⁴I_(9/2) and ⁸S_(7/2), respectively.

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CoversGround terms by Hund's rulesAtomic terms

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