Physics 0625 · IGCSE · The nuclear model of the atom

The nuclear model of the atom — practice question

A sodium nuclide may be shown as $^{23}_{11}\text{Na}$. Which row shows the numbers of particles in a neutral sodium atom?

  • Anumber of electrons 11; number of protons 11; number of neutrons 12
  • Bnumber of electrons 12; number of protons 11; number of neutrons 23
  • Cnumber of electrons 12; number of protons 12; number of neutrons 11
  • Dnumber of electrons 23; number of protons 23; number of neutrons 11

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