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O Level Chemistry Learning App Download - Proton and Nucleon Number Apps (iOS & Android)

O Level Chemistry MCQs - Complete Course

Proton and Nucleon Number MCQs App Download & e-Book - 293

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O Level Chemistry App (Play Store) O Level Chemistry App (App Store)
MCQ: 293

If the nucleon number of potassium is 39, the number of neutrons will be

  1. 39
  2. 19
  3. 20
  4. 29

O Level Chemistry App & e-Book Tests PDF Download

Proton and Nucleon Number Learning App: Free Download Android & iOS

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Proton and Nucleon Number Apps (Android & iOS)

Proton and Nucleon Number App

O Level Chemistry Apps (Android & iOS)

O Level Chemistry App

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