Download O Level Chemistry Quiz App | Proton and Nucleon Number Quiz e-Book PDF | 520
O Level Chemistry MCQs (O Level) From Textbook

O Level Chemistry MCQs – Certification Test 520

Proton and Nucleon Number Quiz (Question 520) – App & e-Book Download

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MCQ 520: If the number of electrons in chlorine is 17, number of shells required will be:

  1. 2
  2. 3
  3. 4
  4. 5

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