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

The Periodic Table: chemical periodicity — practice question

Which line is correct?

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

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