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O Level Chemistry Competitive Exam: Certification Test 720

Proton and Nucleon Number Quiz App & e-Book: MCQ 720

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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 & eBook Quiz

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Proton and Nucleon Number Quiz App (iOS & Android)

Proton and Nucleon Number Quiz App

O Level Chemistry Quiz App (Android & iOS)

O Level Chemistry Quiz App

SAT Chemistry Quiz App (Android & iOS)

SAT Chemistry Quiz App

9th Grade Chemistry Quiz App (Android & iOS)

9th Grade Chemistry Quiz App