The basic character of , , and increases in the order

Question

The basic character of , ,  and  increases in the order

Canvas Classes · Accepted Answer

Strategy:
 Basic character of oxides increases with metallic character and decreasing ionization enthalpy. Typically, alkali metal oxides  alkaline earth metal oxides  transition metal oxides.

Step 1: Categorize each oxide
- : Alkali metal oxide. Highly basic.
- : Group 2 metal, Period 5. More basic than .
- : Group 2 metal, Period 3. Moderately basic.
- : Transition metal oxide. Weakly basic with some amphoteric character.

Step 2: Order

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