Physics 0625 · IGCSE · The nuclear model of the atom

The nuclear model of the atom — practice question

The isotope strontium-90 is represented by the nuclide notation $^{90}_{38}\text{Sr}$. Which statement is correct?

  • AA nucleus of strontium-90 has 38 neutrons.
  • BA nucleus of strontium-90 has 52 neutrons.
  • CA nucleus of strontium-90 has 90 electrons.
  • DA nucleus of strontium-90 has 90 neutrons.

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