Question 9 — Write the formulae for the - Questions at the end of the chapter - Chapter 9 - Atomic Foundations of Matter (Exploration)

Last updated at July 20, 2026 by

Question 9
Write the formulae for the compounds formed by the reaction of: (i) Magnesium and nitrogen (ii) Lithium and nitrogen (iii) Sodium and sulfur (iv) Aluminium and oxygen
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  • (i) Mg²⁺ and N³⁻ → Mg₃N₂ .
  • (ii) Li⁺ and N³⁻ → Li₃N .
  • (iii) Na⁺ and S²⁻ → Na₂S .
  • (iv) Al³⁺ and O²⁻ → Al₂O₃ .
Formulae from Reactions
Mg3N2 Li3N Na2S Al2O3
Back to: 9.5.2 Writing chemical formulae of ionic compounds
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