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

The Periodic Table: chemical periodicity — practice question

Compound X contains two elements. One of them has the second-highest first ionisation energy value in its group, and the other has the third-highest first ionisation energy value in its group. Which compounds might compound X be?

  • A1, 2 and 3
  • B1 and 2 only
  • C2 and 3 only
  • D1 only

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