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

The Periodic Table: chemical periodicity — practice question

Which row is the correct one?

  • Aammonia molecule: pyramidal; ammonium ion: regular tetrahedral; bonds present in ammonia: $\sigma$; bonds present in ammonium: $\sigma$
  • Bammonia molecule: pyramidal; ammonium ion: regular tetrahedral; bonds present in ammonia: $\sigma$; bonds present in ammonium: $\pi$
  • Cammonia molecule: regular tetrahedral; ammonium ion: pyramidal; bonds present in ammonia: $\sigma$; bonds present in ammonium: $\sigma$
  • Dammonia molecule: regular tetrahedral; ammonium ion: pyramidal; bonds present in ammonia: $\pi$; bonds present in ammonium: $\sigma$

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