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Cambridge IGCSE Combined Science practice

If an atom has a mass number of 20 and 10 neutrons, how many protons does it have?

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Show answerAtomic structure and the Periodic Table revisionRevise the key idea

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MCQ

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cambridge_mcq

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Atomic structure and the Periodic Table

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If an atom has a mass number of 20 and 10 neutrons, how many protons does it have?.

  1. A.10
  2. B.20
  3. C.30
  4. D.15

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