Chemistry 0620 · IGCSE · Ions and ionic bonds

Ions and ionic bonds — practice question

Lithium is placed in Group I of the Periodic Table. Nitrogen is placed in Group V of the Periodic Table. When lithium reacts with nitrogen, the ionic compound lithium nitride, $\text{Li}_3\text{N}$, is produced. What occurs to the electrons as lithium atoms and nitrogen atoms change into ions?

  • Aeach lithium atom loses one electron to form an $\text{Li}^+$ ion; each nitrogen atom gains three electrons to form an $\text{N}^{3-}$ ion
  • Beach lithium atom loses one electron to form an $\text{Li}^+$ ion; each nitrogen atom gains five electrons to form an $\text{N}^{5-}$ ion
  • Ceach lithium atom gains one electron to form an $\text{Li}^-$ ion; each nitrogen atom loses three electrons to form an $\text{N}^{3+}$ ion
  • Deach lithium atom gains one electron to form an $\text{Li}^-$ ion; each nitrogen atom loses five electrons to form an $\text{N}^{5+}$ ion

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