Chemistry 9701 · AS & A Level · Atomic structure

Atomic structure — practice question

Helium, $\text{He}$, is the second element in the Periodic Table. Tritium is the isotope of hydrogen $^3_1\text{H}$. What is the same between an atom of $^4_2\text{He}$ and an atom of $^3_1\text{H}$?

  • Athe number of electrons
  • Bthe number of neutrons
  • Cthe number of protons
  • Dthe relative atomic mass

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