Chemistry 0620 · IGCSE · Isotopes

Isotopes — practice question

Four atoms are shown by their symbols: 1: $^{{12}}_6\text{C}$, 2: $^{{14}}_6\text{C}$, 3: $^{{14}}_7\text{N}$, 4: $^{{29}}_{14}\text{Si}$. Which of these atoms contain more neutrons than protons?

  • A1 and 2
  • B2 and 3
  • C2 and 4
  • D3 and 4

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