Основные свойства оксидов усиливаются в ряду

  1. Na2O → CaO → Al2O3
  2. Li2O → BeO → B2O3
  3. BaO → SrO → CaO
  4. Al2O3 → MgO → Na2O

📝 Detailed explanation

Al2O3 → MgO → Na2O — усиление основных свойств.
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