Physics 9702 · AS & A Level · Atoms, nuclei and radiation

Atoms, nuclei and radiation — practice question

A nucleus Q is written as $^{y}_{x}\text{Q}$. Which one of the following is an isotope of Q?

  • A$^{y-1}_{x}\text{Q}$
  • B$^{y}_{x-1}\text{Q}$
  • C$^{y}_{x+1}\text{Q}$
  • D$^{y-1}_{x+1}\text{Q}$

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