Chemistry 0620 · IGCSE · Isotopes

Isotopes — practice question

$^{14}_{6}\text{C}$ and $^{12}_{6}\text{C}$ are isotopes of carbon. Which statement correctly describes these isotopes?

  • A$^{12}_{6}\text{C}$ is more reactive than $^{14}_{6}\text{C}$ because the atoms have less mass.
  • B$^{12}_{6}\text{C}$ is more reactive than $^{14}_{6}\text{C}$ because the atoms have different numbers of neutrons.
  • CThe reactions of $^{12}_{6}\text{C}$ are similar to $^{14}_{6}\text{C}$ because they have the same number of outer shell electrons.
  • DThe reactions of $^{12}_{6}\text{C}$ are similar to $^{14}_{6}\text{C}$ because they have the same number of protons in the nucleus.

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