A Level Chemistry MCQs (A Level) From Textbook

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A Level Chemistry MCQs – Certification Test 745

Electronic Configurations Trivia (Question 745) – Learning App & e-Book Download

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MCQ: 745

The only element which have electronic configuration of 1s2 is

  1. helium
  2. lithium
  3. beryllium
  4. oxygen

Electronic Configurations Study Material – A Level Chemistry App & e-Book Trivia

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Electronic Configurations Trivia App (iOS & Android)

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