Question

Properties of the elements are given below. Where would you locate the following elements in the periodic table?

An element whose thin oxide layer is used to make other elements corrosion-resistant by the process of “anodizing”.

Answer 1

Anodizing:

• Aluminium spontaneously forms a thin but effective oxide layer$\left({\mathrm{Al}}_2{\mathrm{O}}_3\right)$ that could prevent further oxidation and this process is known as the process of anodizing aluminium ($\mathrm{Al}$ ).
• Aluminium oxide is the oxide of aluminium metal used to make other elements corrosion-free.
• The atomic number of aluminium is 13 and the electronic configuration is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^1$.
• The aluminium is in the third period and belongs to group 13.

Therefore, an element whose thin oxide layer is used to make other elements corrosion-resistant by the process of “anodizing” is aluminium and it is in the third period and belongs to group 13.