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1. How the metallic character varies in the periodic table? 2. Categorize the following oxides into acidic, basic, neutral and amphoteric: Al2O3 , Na2O, CO2 , Cl2O7 , MgO, CO, As2O3 , N2O

Answer»

1. The metallic character decreases from left to right across the period due to increase in ionization enthalpy along a period which makes loss of electrons difficult. From top to bottom a group metallic character increases due to decrease in ionization enthalpy. Thus, metallic character decreases diagonally from left bottom to right top of the periodic table.

2. Acidic oxides: CO2 , Cl2O7

Basic oxides: Na2O, MgO

Neutral oxides: CO, N2O

Amphoteric oxides: Al2O3, As2O3 



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