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O Level Chemistry MCQs – Certification Test 720

Proton and Nucleon Number Quiz (Question 720) – App & e-Book Download

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MCQ: 720

If nucleon and proton number of argon is 40 and 18 respectively, the respective number of electrons and neutrons will be

  1. 22 and 40
  2. 18 and 22
  3. 18 and 40
  4. 22 and 28

Proton & Nucleon Number Competitive Exam – O Level Chemistry App & e-Book Quiz

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Proton and Nucleon Number Quiz Apps (iOS & Android)

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O Level Chemistry Quiz Apps (Android & iOS)

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A level Chemistry Quiz Apps (Android & iOS)

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9th Grade Chemistry Quiz App