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Atoms and Elements Quiz App Download | Class 7 Science Quiz Apps (iOS & Android)

Class 7 Science Quiz: Complete Course

Atoms and Elements Quiz App Download & e-Book | 1696

MCQ: 1696

An atom of 'hydrogen' has

  1. one proton and one electron
  2. one proton, one neutron and one electron
  3. one proton and one neutron
  4. one electron and one neutron

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