Chemistry 9701 · AS & A Level · The Periodic Table: chemical periodicity

The Periodic Table: chemical periodicity — practice question

The elements radon (Rn), francium (Fr) and radium (Ra) have successive proton numbers in the Periodic Table. In what order do their first ionisation energies occur?

  • AFr → Ra → Rn
  • BFr → Rn → Ra
  • CRa → Fr → Rn
  • DRn → Ra → Fr

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