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Question
Use Mendeleev's Periodic Table to predict the formula of oxides of potassium, aluminum, and barium.
Solution
K is in Group 1. So, the oxide will be K2O (Potassium oxide).
Al is in Group 3. So, the oxide will be Al2O3 (Aluminium oxide).
Ba is in Group 2. So, the oxide will be BaO (Barium oxide).
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