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The nucleus of an atom consists of

  • A.Electrons and neutrons
  • B.Electrons and protons
  • C.Protons and neutrons
  • D.All of the above

Answer: C

The nucleus consists of protons and neutrons.

Together they are called nucleons and account for almost the whole mass of the atom. The electrons occupy the surrounding orbitals; the nucleus itself is about \(10^{-15}\) m across, some hundred thousand times smaller than the atom.

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