Physics 0625 · IGCSE · The nuclear model of the atom

The nuclear model of the atom — practice question

An isotope of sodium is represented by $^{23}_{11}\text{Na}$. Which row shows the make-up of a neutral atom of this sodium isotope?

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

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