Question 5 — Write the chemical formulae for - Questions at the end of the chapter - Chapter 9 - Atomic Foundations of Matter (Exploration)

Last updated at July 20, 2026 by

Question 5
Write the chemical formulae for the following compounds. (i) Aluminium nitrate (ii) Calcium oxide (iii) Ferric oxide
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  • (i) Al³⁺ + NO₃⁻ → Al(NO₃)₃ .
  • (ii) Ca²⁺ + O²⁻ → CaO .
  • (iii) Fe³⁺ + O²⁻ → Fe₂O₃ .
Writing the Formulae
Aluminium nitrate is Al(NO3)3 Calcium oxide is CaO Ferric oxide is Fe2O3
Back to: 9.5.2 Writing chemical formulae of ionic compounds
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