Physics 0625 · IGCSE · The nuclear model of the atom

The nuclear model of the atom — practice question

How many protons and how many neutrons are present in a nucleus of $^{234}_{90}\text{Th}$?

  • Aprotons $90$, neutrons $144$
  • Bprotons $90$, neutrons $234$
  • Cprotons $144$, neutrons $90$
  • Dprotons $234$, neutrons $90$

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