Question

Which is more basic ${\mathrm{Al}}_2{\mathrm{O}}_3\mathrm{or}\mathrm{MgO}$?

Answer 1

1. The oxides when mixed with water to give acids are called acidic oxides while those that give based on dissolution are called basic oxides.
2. Magnesium and Aluminium are the chemical elements that belong to the second and third groups of the periodic table respectively.
3. The atomic number of Aluminium is $13$ while that of Magnesium is $12.$
4. The general trends are followed in the periodic table, i.e. the basic characters decreases as we move left to right in the period.
5. because Magnesium comes before Aluminium. in the period, Therefore Magnesium oxide is more basic than Aluminium oxides.