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Atoms are composed of

  • A.Electrons and protons
  • B.Protons and nuclei
  • C.Only electrons
  • D.Electrons and nuclei

Answer: D

Atoms are composed of electrons and nuclei.

The nucleus holds the protons and neutrons and almost all the mass; the electrons occupy the surrounding orbitals and determine chemical behaviour. Saying 'electrons and protons' leaves out the neutrons, which is why the fuller answer is the right one.

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