Chemistry 0620 · IGCSE · Relative masses of atoms and molecules

Relative masses of atoms and molecules — practice question

The relative atomic mass, $A_r$, of an element is found by comparing the mass of one atom of the element with the mass of one atom of element Q. What is Q?

  • Acarbon
  • Bchlorine
  • Chydrogen
  • Doxygen

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