Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry

Atoms, molecules and stoichiometry — practice question

The relative atomic mass of antimony is 121.76. There are two isotopes of antimony. Their mass numbers are separated by two. The isotope with the lower mass number has the greater abundance. What percentage abundance does the isotope with the higher mass number have?

  • A12%
  • B38%
  • C62%
  • D88%

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