Chemistry 0620 · IGCSE · Noble gases

Noble gases — practice question

An inert gas R is employed to inflate weather balloons. Which statements about R are correct?

  • Anumber of outer shell electrons = 2; diatomic molecules
  • Bnumber of outer shell electrons = 2; single atoms
  • Cnumber of outer shell electrons = 8; diatomic molecules
  • Dnumber of outer shell electrons = 8; single atoms

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