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UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper I covers general studies.

UPSC Combined Geo-Scientist, Prelims · 2023 · Paper I, General Studies · Q20 of 120

Geo-Scientist Prelims 2023 General Studies Q20: Which one of the following is the correct electronic configuration…

QuestionAtomic structure / electronic configuration

Which one of the following is the correct electronic configuration of copper?

  1. (a) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s¹
  2. (b) 1s²2s²2p⁶3s²3p⁶3d⁹4s²
  3. (c) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²
  4. (d) 1s²2s²2p⁶3s²3p⁶3d⁸4s²

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