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

The Periodic Table: chemical periodicity — practice question

Which row shown is the correct one?

  • A$\text{CO}_2$; linear; total number of electron pairs = two
  • B$\text{BF}_3$; trigonal planar; total number of electron pairs = three
  • C$\text{NH}_3$; regular tetrahedral; total number of electron pairs = four
  • D$\text{PF}_5$; octahedral; total number of electron pairs = six

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